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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Central Africa
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Gabon
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Oklo (1)
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Rwanda (2)
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Congo Craton (2)
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East Africa
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Tanzania (1)
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Uganda (2)
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Zambia (2)
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East African Rift (1)
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Limpopo Belt (1)
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Madagascar
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Antananarivo Madagascar (2)
-
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North Africa
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Atlas Mountains
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Moroccan Atlas Mountains
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Anti-Atlas (1)
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High Atlas (1)
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Middle Atlas (1)
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Ceuta (1)
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Egypt
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Eastern Desert (2)
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Sinai Egypt (1)
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Morocco
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Moroccan Atlas Mountains
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Anti-Atlas (1)
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High Atlas (1)
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Middle Atlas (1)
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Rif (1)
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Tunisia (1)
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Southern Africa
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Barberton greenstone belt (2)
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Kaapvaal Craton (1)
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Kalahari Craton (2)
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Namibia
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Damara Belt (1)
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Kaoko Belt (1)
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Otavi Namibia (1)
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Tsumeb Namibia (1)
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South Africa
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Bushveld Complex (1)
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North-West Province South Africa (1)
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Witwatersrand (1)
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Zimbabwe
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Great Dyke (1)
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West Africa
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Ghana (1)
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Mali (1)
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Nigeria
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Niger Delta (1)
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Sierra Leone (2)
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Zimbabwe Craton (1)
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Alexander Terrane (2)
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America (1)
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Antarctica
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Antarctic ice sheet
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Antarctic Peninsula (2)
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East Antarctica (4)
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Marie Byrd Land
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Queen Maud Land
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Arctic Ocean
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Norwegian Sea
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Arctic region
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Greenland
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East Greenland (2)
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Svalbard
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Asia
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Altai Mountains (2)
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Arabian Peninsula
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Oman (2)
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Saudi Arabia (2)
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United Arab Emirates
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Yemen (1)
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Baikal region (1)
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Central Asia
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Kazakhstan
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Pamirs (1)
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Chukotka Russian Federation
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Far East
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Borneo
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China
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Ryukyu Islands
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Malaysia
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East Malaysia
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Mongolia (1)
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Himalayas
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Orissa India
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Rajasthan India (3)
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Pakistan
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Indus River (1)
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Indus-Yarlung Zangbo suture zone (2)
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Irkutsk Russian Federation
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Irtysh River (1)
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Karakoram (3)
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Krasnoyarsk Russian Federation (5)
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Middle East
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Iran
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Iraq (2)
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Israel
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Jordan (1)
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Turkey
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Siberia (4)
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West Siberia
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Zabaykalskiy Russian Federation (1)
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Atlantic Ocean
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North Atlantic
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North Sea (14)
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West Atlantic (1)
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Atlantic Ocean Islands
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Azores
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Sao Miguel Island
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Canary Islands
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Shetland Islands (1)
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Atlantic region (3)
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Australasia
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Australia
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Eromanga Basin (1)
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Lachlan fold belt (1)
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New South Wales Australia (3)
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South Australia
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Victoria Australia
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Western Australia
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New Zealand
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Taupo (2)
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Papua New Guinea (1)
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Avalon Zone (6)
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Canada
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Arctic Archipelago (2)
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Eastern Canada
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Baffin Island (5)
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Gander Zone (3)
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Maritime Provinces
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Nova Scotia
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Meguma Terrane (5)
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Newfoundland and Labrador
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Labrador (3)
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Newfoundland
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Ontario
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Quebec
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Manicouagan Lake (1)
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Monteregian Hills (3)
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Nunavut
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Russian Federation
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Ukraine
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Murmansk Russian Federation
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placers (2)
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elements, isotopes
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boron
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carbon
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C-13/C-12 (41)
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C-14 (13)
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organic carbon (7)
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chemical ratios (6)
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halogens
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chlorine
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Cl-36 (1)
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fluorine (8)
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hydrogen
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incompatible elements (2)
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Al-26 (5)
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Sm-147/Nd-144 (3)
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tritium (1)
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stable isotopes
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Ar-36 (1)
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Ar-40 (1)
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Ar-40/Ar-39 (5)
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B-11/B-10 (1)
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Be-10/Be-9 (1)
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C-13/C-12 (41)
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D/H (9)
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deuterium (3)
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He-3 (1)
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He-4 (1)
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He-4/He-3 (3)
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Hf-177/Hf-176 (7)
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Kr-84 (1)
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Li-6 (1)
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Li-7 (1)
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Li-7/Li-6 (2)
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N-15/N-14 (1)
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Nd-144/Nd-143 (18)
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Ne-21 (1)
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O-18/O-16 (46)
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Os-188/Os-187 (1)
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Pb-206/Pb-204 (9)
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Pb-207/Pb-204 (7)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-204 (6)
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Rb-87/Sr-86 (2)
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S-34/S-32 (8)
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Sm-147/Nd-144 (3)
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Sr-87/Sr-86 (20)
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Lu/Hf (4)
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metals
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actinides
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plutonium
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Pu-244 (1)
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thorium (4)
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uranium
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U-238/U-234 (1)
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alkali metals
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cesium
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Cs-137 (3)
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lithium
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Li-6 (1)
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Li-7 (1)
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Li-7/Li-6 (2)
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rubidium
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Rb-87/Sr-86 (2)
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sodium (3)
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alkaline earth metals
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barium (2)
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beryllium
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Be-10 (10)
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Be-10/Be-9 (1)
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Be-7 (2)
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calcium
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Sr/Ca (1)
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magnesium (3)
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strontium
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Rb-87/Sr-86 (2)
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Sr/Ca (1)
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Sr-87/Sr-86 (20)
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aluminum
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Al-26 (5)
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arsenic (5)
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chromium (1)
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copper (1)
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gallium (1)
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gold (2)
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hafnium
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Hf-177/Hf-176 (7)
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iron
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ferric iron (6)
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ferrous iron (2)
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lead
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Pb-206/Pb-204 (9)
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Pb-207/Pb-204 (7)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-204 (6)
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Pb-210 (3)
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manganese (8)
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nickel (3)
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niobium (8)
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platinum group
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osmium
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Os-188/Os-187 (1)
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platinum ores (2)
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precious metals (1)
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rare earths
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cerium (2)
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europium (2)
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lanthanum (2)
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lutetium (1)
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neodymium
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Nd-144/Nd-143 (18)
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Sm-147/Nd-144 (3)
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samarium
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Sm-147/Nd-144 (3)
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ytterbium (2)
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yttrium (11)
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tantalum (6)
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vanadium (2)
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zirconium (3)
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nitrogen
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N-15/N-14 (1)
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noble gases
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argon
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Ar-36 (1)
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Ar-40 (1)
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Ar-40/Ar-39 (5)
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helium
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He-3 (1)
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He-4 (1)
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He-4/He-3 (3)
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krypton
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Kr-84 (1)
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neon
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Ne-21 (1)
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radon
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Rn-222 (1)
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xenon (2)
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oxygen
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O-18/O-16 (46)
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phosphorus (4)
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silicon (1)
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sulfur
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S-34/S-32 (8)
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fossils
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bacteria
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Shewanella (1)
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borings (2)
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Chordata
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Vertebrata
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Pisces
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Chondrichthyes
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Osteichthyes
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Actinopterygii
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Tetrapoda
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Amphibia
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Anura (1)
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Mammalia
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Theria
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Archaeoceti (2)
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Insectivora (1)
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Notoungulata (2)
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Perissodactyla (1)
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Primates
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Prosimii
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Omomyidae (1)
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Rodentia
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Myomorpha
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Gliridae (1)
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Metatheria
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Marsupialia (1)
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Reptilia
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Anapsida
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Testudines
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Chelonia (1)
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Diapsida
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Archosauria
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Crocodilia
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Eusuchia
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Crocodylidae (2)
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dinosaurs
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Saurischia
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Theropoda (1)
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Lepidosauria
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Squamata
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Lacertilia (1)
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coprolites (2)
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cyanobacteria (1)
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Graptolithina
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Graptoloidea (1)
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Hemichordata (1)
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ichnofossils
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Arenicolites (1)
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Ophiomorpha (1)
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Thalassinoides (1)
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Invertebrata
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Arthropoda
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Chelicerata
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Merostomata
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Eurypterida (2)
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Mandibulata
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Crustacea
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Branchiopoda (1)
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Malacostraca
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Brachyura (5)
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Ostracoda (5)
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Insecta
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Pterygota
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Neoptera
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Endopterygota
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Coleoptera (3)
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Diptera
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Chironomidae (1)
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Trilobitomorpha
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Trilobita
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Redlichiida (1)
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Brachiopoda (5)
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Bryozoa
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Cheilostomata (1)
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Cnidaria
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Anthozoa
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Zoantharia
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Scleractinia
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Acropora (1)
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Tabulata (1)
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Scyphozoa (1)
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Echinodermata
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Crinozoa
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Crinoidea (4)
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Echinozoa
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Echinoidea (3)
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Mollusca
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Bivalvia
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Heterodonta
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Veneroida
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Carditidae (1)
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Pterioida
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Pteriina
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Inocerami
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Inoceramidae (2)
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Pectinacea
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Pectinidae (1)
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Cephalopoda
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Ammonoidea
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Ammonites (1)
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Gastropoda
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Mesogastropoda (1)
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Neogastropoda (3)
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Turritellidae
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Turritella (1)
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Hyolithes (3)
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Polyplacophora (1)
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Porifera
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Stromatoporoidea (1)
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Protista
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Foraminifera
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Rotaliina
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Nodosariidae
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Lenticulina (1)
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Rotaliacea
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Ammonia
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Elphidium
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Elphidium excavatum (1)
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Nummulitidae
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Nummulites
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Operculina (1)
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Rotalia (1)
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Radiolaria (1)
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Metazoa (1)
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microfossils
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Charophyta
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Characeae (1)
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Conodonta (2)
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palynomorphs
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Dinoflagellata (23)
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megaspores (1)
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miospores
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pollen (12)
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Plantae
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algae
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Chlorophyta
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Charophyta
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Characeae (1)
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Tasmanites (1)
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Chrysophyta (1)
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diatoms (2)
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Microcodium (1)
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nannofossils (9)
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Rhodophyta
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Corallinaceae (1)
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Pteridophyta
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Filicopsida
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Archaeopteris (1)
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Azolla (1)
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Lycopsida (1)
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Spermatophyta
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Angiospermae
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Dicotyledoneae
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Alnus (1)
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Betula (1)
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Ericaceae (1)
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Quercus (1)
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Monocotyledoneae
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Palmae (1)
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Gymnospermae
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Coniferales
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Pinaceae
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Abies (1)
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Pinus (1)
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problematic fossils (2)
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prokaryotes (1)
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Pterobranchia (1)
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thallophytes (2)
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tracks (3)
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geochronology methods
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(U-Th)/He (10)
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Ar/Ar (37)
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exposure age (4)
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fission-track dating (13)
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K/Ar (15)
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lichenometry (1)
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Lu/Hf (4)
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optically stimulated luminescence (3)
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paleomagnetism (18)
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Pb/Pb (5)
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Pb/Th (9)
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radiation damage (2)
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Rb/Sr (9)
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Re/Os (1)
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Sm/Nd (3)
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tephrochronology (1)
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Th/U (3)
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thermochronology (17)
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thermoluminescence (1)
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tree rings (3)
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U/Pb (103)
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U/Th/Pb (35)
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uranium disequilibrium (1)
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geologic age
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Anthropocene (1)
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Cenozoic
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Quaternary
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Holocene
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upper Holocene
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Roman period (2)
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lower Quaternary (1)
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Pleistocene
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Champlain Sea (1)
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Lake Agassiz (1)
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Lake Algonquin (1)
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lower Pleistocene (2)
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Matuyama Chron (1)
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middle Pleistocene (3)
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upper Pleistocene
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Devensian (2)
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Ipswichian (1)
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Lake Iroquois (2)
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Weichselian
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upper Weichselian
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Allerod (1)
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Bolling (1)
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Younger Dryas (1)
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Wisconsinan
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upper Wisconsinan (1)
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upper Quaternary
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Brunhes Chron (1)
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Pinedale Glaciation (1)
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Siwalik System (1)
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Stone Age
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Paleolithic
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Acheulian (1)
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Tertiary
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lower Tertiary (1)
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middle Tertiary
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Deseadan (1)
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Neogene
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Miocene
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Aragonian (1)
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Astoria Formation (1)
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lower Miocene (2)
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middle Miocene
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Langhian (1)
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Serravallian (2)
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Stevens Sandstone (1)
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upper Miocene
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Tortonian (2)
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Turolian (1)
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Vallesian (1)
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Pliocene
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lower Pliocene (1)
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upper Pliocene (3)
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Yorktown Formation (1)
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Paleogene
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Claron Formation (1)
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Eocene
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Bracklesham Group (6)
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Ghazij Formation (2)
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lower Eocene
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Hatchetigbee Formation (1)
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Sparnacian (3)
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Wasatchian (1)
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Willwood Formation (2)
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Ypresian
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London Clay (13)
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middle Eocene
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Barton Clay (3)
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Bartonian (8)
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Lutetian (9)
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Subathu Formation (1)
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upper Eocene
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La Meseta Formation (1)
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Piney Point Formation (1)
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Priabonian (7)
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-
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lower Paleogene (4)
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Ocala Group (1)
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Oligocene
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Bembridge Marls (1)
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Frio Formation (1)
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lower Oligocene
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Rupelian (2)
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upper Oligocene
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Chattian (2)
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Paleocene
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lower Paleocene
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Danian (1)
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K-T boundary (4)
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Puercan (1)
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upper Paleocene
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Thanetian (4)
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-
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Paleocene-Eocene Thermal Maximum (7)
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Williamsburg Formation (1)
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Sarmiento Formation (1)
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upper Cenozoic (3)
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Dalradian (9)
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Laurentide ice sheet (7)
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Mesozoic
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Antalya Complex (1)
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Cretaceous
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Logan Canyon Formation (1)
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Lower Cretaceous
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Albian
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upper Albian (2)
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Aptian (4)
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Barremian (2)
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Berriasian (1)
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Gault Clay (2)
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Hauterivian (1)
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Missisauga Formation (1)
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Mowry Shale (1)
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Neocomian (1)
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Valanginian (1)
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Wealden (4)
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-
Lower Greensand (2)
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Middle Cretaceous (3)
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Upper Cretaceous
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Bearpaw Formation (1)
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Blackhawk Formation (1)
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Campanian
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upper Campanian (1)
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-
Cardium Formation (2)
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Cenomanian (6)
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Dawson Canyon Formation (1)
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Ferron Sandstone Member (2)
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Frontier Formation (1)
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Greenhorn Limestone (1)
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Gulfian
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Aguja Formation (1)
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-
Hell Creek Formation (1)
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K-T boundary (4)
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Lance Formation (1)
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Maestrichtian
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upper Maestrichtian (1)
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-
Navesink Formation (1)
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Niobrara Formation (1)
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Point Lookout Sandstone (1)
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Prince Creek Formation (1)
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Santonian (4)
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Senonian (3)
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Turonian
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middle Turonian (1)
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-
-
Viking Formation (1)
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-
Franciscan Complex (1)
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Jurassic
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Lower Jurassic
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Hettangian (1)
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Pliensbachian (1)
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Portland Formation (1)
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Toarcian (1)
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Middle Jurassic
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Bathonian
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Great Oolite Group (1)
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Callovian (1)
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Dogger (1)
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Upper Jurassic
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Kimmeridge Clay (2)
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Kimmeridgian (3)
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Oxfordian (1)
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Tithonian (2)
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-
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Kayenta Formation (1)
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lower Mesozoic (1)
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Newark Supergroup (1)
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Triassic
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Hawkesbury Sandstone (1)
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Lower Triassic (1)
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Middle Triassic (2)
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Upper Triassic
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Carnian (1)
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Chinle Formation (1)
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Mercia Mudstone (1)
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Norian (1)
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Rhaetian
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Penarth Group (1)
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-
-
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upper Mesozoic (2)
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MIS 5 (1)
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MIS 7 (2)
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Moldanubian (1)
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Paleozoic
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Berea Sandstone (1)
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Cambrian
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Acadian (4)
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Lower Cambrian
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Chilhowee Group (1)
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Pinney Hollow Formation (1)
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Rome Formation (1)
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Middle Cambrian (3)
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Upper Cambrian
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Furongian (1)
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Goldenville Formation (2)
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Potsdam Sandstone (4)
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Steptoean (1)
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-
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Cape Elizabeth Formation (1)
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Carboniferous
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Lower Carboniferous
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Dinantian (1)
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Middle Carboniferous (1)
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Mississippian
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Big Injun Sandstone (1)
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Lower Mississippian
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Pocono Formation (4)
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Middle Mississippian
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Visean (2)
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-
Price Formation (1)
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Upper Mississippian
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Mauch Chunk Formation (1)
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Meramecian
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Salem Limestone (1)
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-
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Pennsylvanian
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Conemaugh Group (1)
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Lower Pennsylvanian
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Lee Formation (1)
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Middle Pennsylvanian
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Allegheny Group (2)
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Atokan (1)
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Carbondale Formation (1)
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Moscovian (1)
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Monongahela Group (1)
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Pottsville Group (1)
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Upper Pennsylvanian
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Gzhelian (1)
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Virgilian (1)
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-
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Silesian (1)
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Casco Bay Group (2)
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Catskill Formation (2)
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Devonian
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Fisset Brook Formation (1)
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Gile Mountain Formation (2)
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Lower Devonian
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Emsian (7)
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Littleton Formation (3)
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Oriskany Sandstone (3)
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Pragian (1)
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Middle Devonian
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Eifelian (3)
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Marcellus Shale (4)
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Onondaga Limestone (3)
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Tioga Bentonite (1)
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-
Millboro Shale (1)
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Old Red Sandstone (5)
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Upper Devonian
-
Brallier Shale (1)
-
Canadaway Group (1)
-
Chemung Formation (1)
-
Cleveland Member (1)
-
Famennian (1)
-
Frasnian (2)
-
Hampshire Formation (4)
-
Ohio Shale (1)
-
-
-
Dunkard Group (1)
-
Hartland Formation (1)
-
lower Paleozoic
-
Chopawamsic Formation (1)
-
Penobscot Formation (1)
-
Wilmington Complex (1)
-
-
Merrimack Group (1)
-
middle Paleozoic (2)
-
Ordovician
-
Acoite Formation (1)
-
Lower Ordovician
-
Beekmantown Group (1)
-
El Paso Group (1)
-
Tremadocian
-
Halifax Formation (1)
-
-
-
Martinsburg Formation (2)
-
Middle Ordovician
-
Ammonoosuc Volcanics (3)
-
Black River Group (1)
-
Chazy Group (2)
-
Deicke Bentonite Bed (1)
-
Llanvirnian (1)
-
-
Trenton Group (4)
-
Upper Ordovician
-
Katian (1)
-
Lorraine Group (1)
-
Maquoketa Formation (1)
-
Reedsville Formation (1)
-
Sandbian (1)
-
-
Utica Shale (2)
-
-
Permian
-
Ecca Group (1)
-
Guadalupian
-
Bell Canyon Formation (1)
-
Capitanian (1)
-
-
Irati Formation (1)
-
Lower Permian
-
Cisuralian
-
Artinskian (1)
-
Asselian (1)
-
Sakmarian (1)
-
-
-
Middle Permian (2)
-
Rotliegendes (1)
-
Upper Permian (2)
-
-
Rangeley Formation (2)
-
Silurian
-
Lower Silurian
-
Llandovery
-
Aeronian (1)
-
Telychian (1)
-
-
Qalibah Formation (1)
-
Wenlock (2)
-
-
Middle Silurian
-
Clinton Group (1)
-
-
Perry Mountain Formation (1)
-
Upper Silurian
-
Cayugan
-
Tonoloway Limestone (1)
-
-
Ludlow (2)
-
Pridoli (1)
-
Salina Group (1)
-
-
Waterville Formation (1)
-
-
Tensleep Sandstone (1)
-
Tippecanoe Sequence (1)
-
upper Paleozoic
-
Tirrawarra Sandstone (1)
-
-
Waits River Formation (1)
-
Wissahickon Formation (1)
-
-
Phanerozoic (9)
-
Precambrian
-
Archean
-
Aravalli System (1)
-
Fig Tree Group (2)
-
Gangpur Series (1)
-
Mesoarchean (2)
-
Neoarchean (3)
-
Paleoarchean (1)
-
Taihua Group (1)
-
-
Catoctin Formation (1)
-
Cuddapah System (1)
-
Hadean (3)
-
Minas Supergroup (1)
-
Onverwacht Group (2)
-
Prichard Formation (1)
-
Prince Albert Group (1)
-
upper Precambrian
-
Proterozoic
-
Damara System (2)
-
Dedham Granodiorite (1)
-
Huronian (1)
-
McNamara Group (1)
-
Mesoproterozoic
-
Belt Supergroup (3)
-
Ravalli Group (1)
-
Revett Quartzite (1)
-
Stenian (1)
-
-
Neoproterozoic
-
Ediacaran (6)
-
Moine Supergroup (1)
-
Riphean (3)
-
Tonian (2)
-
-
Paleoproterozoic
-
Aphebian
-
Hurwitz Group (1)
-
-
-
Roan Supergroup (1)
-
-
-
Witwatersrand Supergroup (1)
-
-
-
igneous rocks
-
igneous rocks
-
carbonatites (2)
-
kimberlite (3)
-
plutonic rocks
-
anorthosite (3)
-
diabase
-
tholeiitic dolerite (1)
-
-
diorites
-
quartz diorites (1)
-
tonalite (5)
-
trondhjemite (3)
-
-
essexite (1)
-
gabbros
-
norite (1)
-
-
granites
-
alkali granites (1)
-
aplite (2)
-
A-type granites (8)
-
biotite granite (2)
-
charnockite (1)
-
I-type granites (6)
-
leucogranite (8)
-
microgranite (1)
-
monzogranite (2)
-
muscovite granite (1)
-
S-type granites (3)
-
two-mica granite (3)
-
-
granodiorites (5)
-
lamprophyres
-
camptonite (1)
-
kersantite (1)
-
minette (2)
-
spessartite (2)
-
-
monzodiorite (2)
-
monzonites
-
mangerite (1)
-
-
pegmatite (37)
-
quartz monzonite (2)
-
syenites
-
albitite (1)
-
nepheline syenite
-
foyaite (1)
-
-
quartz syenite (2)
-
-
ultramafics
-
peridotites (2)
-
pyroxenite (1)
-
-
-
volcanic rocks
-
andesites (1)
-
basalts
-
alkali basalts (1)
-
flood basalts (1)
-
mid-ocean ridge basalts (4)
-
tholeiite (1)
-
-
dacites (1)
-
glasses (1)
-
komatiite (1)
-
nephelinite (1)
-
phonolites (1)
-
pyroclastics
-
hyaloclastite (1)
-
ignimbrite (6)
-
tuff (6)
-
-
rhyolites (10)
-
trachyandesites (1)
-
trachytes (3)
-
-
-
ophiolite (5)
-
volcanic ash (4)
-
-
metamorphic rocks
-
K-bentonite (2)
-
metabentonite (1)
-
metamorphic rocks
-
amphibolites (14)
-
cataclasites (3)
-
eclogite (7)
-
gneisses
-
augen gneiss (1)
-
biotite gneiss (1)
-
granite gneiss (3)
-
orthogneiss (4)
-
paragneiss (10)
-
sillimanite gneiss (1)
-
tonalite gneiss (1)
-
-
gondite (1)
-
granulites
-
kinzigite (1)
-
-
hornfels (1)
-
impactites (1)
-
marbles (11)
-
metaigneous rocks
-
metabasite (1)
-
metadiabase (3)
-
metagabbro (2)
-
metapyroxenite (1)
-
metatuff (1)
-
serpentinite (2)
-
-
metaplutonic rocks (4)
-
metasedimentary rocks
-
khondalite (1)
-
metaconglomerate (1)
-
metalimestone (1)
-
metapelite (30)
-
metasandstone (2)
-
paragneiss (10)
-
-
metasomatic rocks
-
serpentinite (2)
-
skarn (1)
-
-
metavolcanic rocks (14)
-
migmatites
-
anatexite (4)
-
-
mylonites
-
blastomylonite (2)
-
pseudotachylite (1)
-
-
phyllites (3)
-
quartzites (13)
-
schists
-
blueschist (3)
-
greenschist (2)
-
greenstone (3)
-
muscovite schist (1)
-
-
slates (3)
-
-
ophiolite (5)
-
turbidite (7)
-
-
meteorites
-
meteorites
-
micrometeorites (1)
-
stony meteorites
-
achondrites
-
Martian meteorites
-
SNC Meteorites
-
chassignite (1)
-
nakhlite (1)
-
shergottite (1)
-
-
-
-
chondrites
-
carbonaceous chondrites (1)
-
-
-
-
-
minerals
-
alloys (1)
-
amosite (1)
-
antimonides (1)
-
arsenates
-
pharmacosiderite (1)
-
scorodite (1)
-
-
arsenides
-
arsenopyrite (1)
-
sperrylite (1)
-
-
borates (1)
-
carbonates
-
ankerite (1)
-
aragonite (1)
-
bastnaesite (1)
-
calcite (12)
-
cerussite (1)
-
dolomite (2)
-
siderite (1)
-
smithsonite (1)
-
spurrite (2)
-
synchysite (1)
-
-
halides
-
fluorides
-
bastnaesite (1)
-
cryolite (1)
-
fluorite (1)
-
synchysite (1)
-
topaz (3)
-
triplite (3)
-
-
-
K-bentonite (2)
-
manganese minerals (3)
-
metabentonite (1)
-
minerals (3)
-
native elements
-
diamond (2)
-
graphite (15)
-
-
nitrates (2)
-
onyx (2)
-
oxides
-
baddeleyite (1)
-
cassiterite (3)
-
chromite (1)
-
chrysoberyl (1)
-
corundum (3)
-
cryptomelane (1)
-
cuprite (1)
-
ferrihydrite (1)
-
gahnite (1)
-
goethite (3)
-
hematite (10)
-
hercynite (2)
-
hibonite (1)
-
hydroxides (2)
-
ilmenite (12)
-
iron oxides (4)
-
limonite (1)
-
maghemite (2)
-
magnesioferrite (1)
-
magnetite (12)
-
manganese oxides (1)
-
niobates
-
columbite (7)
-
pyrochlore (2)
-
tapiolite (1)
-
-
perovskite (1)
-
rutile (9)
-
sapphire (1)
-
spinel (6)
-
spinel group (2)
-
tantalates
-
microlite (1)
-
tantalite (4)
-
-
thorianite (2)
-
titanomagnetite (1)
-
uraninite (1)
-
wustite (2)
-
-
phosphates
-
amblygonite (2)
-
apatite (29)
-
barbosalite (1)
-
britholite (1)
-
crandallite (2)
-
eosphorite (2)
-
fluorapatite (5)
-
goyazite (2)
-
graftonite (7)
-
herderite (1)
-
hureaulite (1)
-
hydroxylapatite (1)
-
lazulite (2)
-
lithiophilite (3)
-
monazite (78)
-
montebrasite (6)
-
rockbridgeite (3)
-
sarcopside (3)
-
strengite (1)
-
triphylite (8)
-
triplite (3)
-
turquoise (1)
-
vivianite (3)
-
xenotime (8)
-
-
platinum minerals (2)
-
silicates
-
aluminosilicates (2)
-
asbestos (2)
-
chain silicates
-
aenigmatite group
-
rhonite (1)
-
sapphirine (1)
-
-
amphibole group
-
alkalic amphibole (1)
-
clinoamphibole
-
actinolite (1)
-
arfvedsonite (3)
-
cummingtonite (3)
-
grunerite (1)
-
hornblende (5)
-
kaersutite (1)
-
pargasite (2)
-
richterite (1)
-
riebeckite (2)
-
-
orthoamphibole
-
anthophyllite (2)
-
gedrite (7)
-
holmquistite (2)
-
-
-
pyroxene group
-
clinopyroxene
-
aegirine (3)
-
diopside (1)
-
jadeite (2)
-
spodumene (2)
-
-
orthopyroxene (3)
-
-
wollastonite group
-
wollastonite (2)
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
adularia (2)
-
anorthoclase (1)
-
celsian (1)
-
K-feldspar (10)
-
microcline (1)
-
orthoclase (1)
-
perthite (3)
-
sanidine (4)
-
-
barium feldspar
-
celsian (1)
-
-
plagioclase
-
albite (3)
-
anorthite (1)
-
-
-
leucite (1)
-
nepheline group
-
kalsilite (1)
-
nepheline (2)
-
-
silica minerals
-
agate (2)
-
amethyst (1)
-
carnelian (1)
-
chalcedony (1)
-
chrysoprase (1)
-
coesite (1)
-
jasper (1)
-
moganite (1)
-
opal
-
opal-A (1)
-
opal-CT (2)
-
-
quartz
-
smoky quartz (1)
-
-
tridymite (1)
-
-
sodalite group
-
helvite (1)
-
tugtupite (1)
-
-
zeolite group
-
clinoptilolite (3)
-
pollucite (2)
-
-
-
orthosilicates
-
nesosilicates
-
andalusite (6)
-
braunite (2)
-
britholite group
-
britholite (1)
-
-
chloritoid (1)
-
garnet group
-
almandine (4)
-
andradite (1)
-
grossular (2)
-
hydrogarnet
-
hydrogrossular (1)
-
-
pyrope (1)
-
spessartine (3)
-
-
kyanite (13)
-
larnite (1)
-
olivine group
-
fayalite (1)
-
olivine (1)
-
-
sillimanite (12)
-
spurrite (2)
-
staurolite (8)
-
titanite group
-
titanite (5)
-
-
topaz (3)
-
zircon group
-
coffinite (1)
-
zircon (109)
-
-
-
sorosilicates
-
bertrandite (1)
-
chevkinite group
-
chevkinite (3)
-
perrierite (5)
-
-
epidote group
-
allanite (7)
-
epidote (4)
-
-
-
-
ring silicates
-
aquamarine (1)
-
beryl (6)
-
cordierite (9)
-
emerald (3)
-
tourmaline group
-
dravite (2)
-
elbaite (1)
-
schorl (3)
-
-
-
sheet silicates
-
cerolite (1)
-
chlorite group
-
chlorite (16)
-
clinochlore (2)
-
sudoite (2)
-
-
clay minerals
-
allophane (1)
-
beidellite (5)
-
dickite (1)
-
halloysite (1)
-
kaolinite (14)
-
montmorillonite (6)
-
nontronite (3)
-
saponite (2)
-
smectite (44)
-
stevensite (1)
-
vermiculite (5)
-
-
clintonite (1)
-
corrensite (1)
-
illite (45)
-
margarite (1)
-
mica group
-
annite (1)
-
biotite (32)
-
celadonite (2)
-
glauconite (12)
-
lepidolite (2)
-
muscovite (29)
-
paragonite (2)
-
phengite (5)
-
phlogopite (3)
-
-
palygorskite (4)
-
petalite (1)
-
pyrophyllite (1)
-
rectorite (1)
-
sepiolite (1)
-
serpentine group
-
chrysotile (2)
-
lizardite (1)
-
serpentine (3)
-
-
talc (1)
-
tosudite (1)
-
-
-
sulfates
-
alunite (3)
-
barite (5)
-
celestine (2)
-
gypsum (2)
-
-
sulfides
-
arsenopyrite (1)
-
chalcopyrite (2)
-
cooperite (1)
-
galena (2)
-
greigite (1)
-
helvite (1)
-
laurite (1)
-
molybdenite (1)
-
pyrite (4)
-
sphalerite (3)
-
zinc sulfides (1)
-
-
sulfosalts
-
sulfarsenites
-
gratonite (1)
-
jordanite (1)
-
-
-
tellurides (1)
-
tungstates
-
scheelite (2)
-
wolframite (1)
-
-
uranium minerals (2)
-
-
Primary terms
-
absolute age (184)
-
academic institutions (1)
-
Africa
-
Central Africa
-
Gabon
-
Oklo (1)
-
-
Rwanda (2)
-
-
Congo Craton (2)
-
East Africa
-
Tanzania (1)
-
Uganda (2)
-
Zambia (2)
-
-
East African Rift (1)
-
Limpopo Belt (1)
-
Madagascar
-
Antananarivo Madagascar (2)
-
-
North Africa
-
Atlas Mountains
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Moroccan Atlas Mountains
-
Anti-Atlas (1)
-
High Atlas (1)
-
Middle Atlas (1)
-
-
-
Ceuta (1)
-
Egypt
-
Eastern Desert (2)
-
Sinai Egypt (1)
-
-
Morocco
-
Moroccan Atlas Mountains
-
Anti-Atlas (1)
-
High Atlas (1)
-
Middle Atlas (1)
-
-
Rif (1)
-
-
Tunisia (1)
-
-
Southern Africa
-
Barberton greenstone belt (2)
-
Kaapvaal Craton (1)
-
Kalahari Craton (2)
-
Namibia
-
Damara Belt (1)
-
Kaoko Belt (1)
-
Otavi Namibia (1)
-
Tsumeb Namibia (1)
-
-
South Africa
-
Bushveld Complex (1)
-
North-West Province South Africa (1)
-
Witwatersrand (1)
-
-
Zimbabwe
-
Great Dyke (1)
-
-
-
West Africa
-
Ghana (1)
-
Mali (1)
-
Nigeria
-
Niger Delta (1)
-
-
Sierra Leone (2)
-
-
Zimbabwe Craton (1)
-
-
Antarctica
-
Antarctic ice sheet
-
East Antarctic ice sheet (1)
-
-
Antarctic Peninsula (2)
-
East Antarctica (4)
-
James Ross Island (1)
-
Marie Byrd Land
-
Fosdick Mountains (1)
-
-
Queen Maud Land
-
East Ongul Island (1)
-
Lutzow-Holm Bay (1)
-
Sor-Rondane Mountains (1)
-
-
Transantarctic Mountains (1)
-
Victoria Land
-
Allan Hills (1)
-
Yamato Mountains (1)
-
-
West Antarctica (1)
-
-
Arctic Ocean
-
Alpha Cordillera (2)
-
Amerasia Basin (1)
-
Canada Basin (2)
-
Eurasia Basin (1)
-
Fram Strait (1)
-
Kara Sea (1)
-
Lomonosov Ridge (3)
-
Makarov Basin (1)
-
Mendeleyev Ridge (1)
-
Mid-Arctic Ocean Ridge (1)
-
Norwegian Sea
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Voring Plateau (1)
-
-
-
Arctic region
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Greenland
-
East Greenland (2)
-
Greenland ice sheet (1)
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Ilimaussaq (1)
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Kangerlussuaq (1)
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Northern Greenland (2)
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Peary Land (1)
-
Skaergaard Intrusion (1)
-
South Greenland (1)
-
West Greenland (1)
-
-
Svalbard
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Spitsbergen
-
Spitsbergen Island (1)
-
-
-
-
asbestos deposits (1)
-
Asia
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Altai Mountains (2)
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Arabian Peninsula
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Oman (2)
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Saudi Arabia (2)
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United Arab Emirates
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Abu Dhabi (1)
-
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Yemen (1)
-
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Baikal region (1)
-
Baikal rift zone (1)
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Brahmaputra River (1)
-
Central Asia
-
Kazakhstan
-
Eastern Kazakhstan
-
Semipalatinsk Kazakhstan (1)
-
-
-
Pamirs (1)
-
-
Chukotka Russian Federation
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Chukchi Peninsula (1)
-
-
Far East
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Borneo
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East Malaysia
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Sarawak Malaysia (1)
-
-
-
China
-
Chongqing China (1)
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Jiangxi China (1)
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Kunlun Mountains (1)
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North China Platform (3)
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Qilian Mountains (1)
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Qinling Mountains (1)
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Shandong China
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Dongying Depression (1)
-
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Sulu Terrane (1)
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Tarim Platform (1)
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Xiaoqinling Mountains (1)
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Xinjiang China
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Junggar Basin (1)
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Xizang China
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Gangdese Belt (1)
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Yunnan China (1)
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Indonesia
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Java (1)
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Sumatra (1)
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Japan
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Honshu
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Aichi Japan (1)
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Fukui Japan (1)
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Iwate Japan
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Kakkonda Field (1)
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Niigata Japan (2)
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Ryoke Belt (1)
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Kyushu (1)
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Ryukyu Islands
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Okinawa (1)
-
-
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Malaysia
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East Malaysia
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Sarawak Malaysia (1)
-
-
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Mongolia (1)
-
-
Himalayas
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High Himalayan Crystallines (1)
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Nanga Parbat (1)
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Zanskar Range (1)
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Hindu Kush (1)
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Indian Peninsula
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Bhutan (1)
-
India
-
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North America
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Ocean Drilling Program
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
western New Hampshire
ERRATUM: Geochemical and tectonic evolution of the Ordovician Bronson Hill arc and Silurian and Devonian Connecticut Valley–Gaspé trough: Eastern Vermont and western New Hampshire, USA Open Access
Geochemical and tectonic evolution of the Ordovician Bronson Hill arc and Silurian and Devonian Connecticut Valley–Gaspé trough: Eastern Vermont and western New Hampshire, USA Open Access
Geochronology of the Oliverian Plutonic Suite and the Ammonoosuc Volcanics in the Bronson Hill arc: Western New Hampshire, USA Open Access
Trondhjemite and metamorphosed quartz keratophyre tuff of the Ammonoosuc Volcanics (Ordovician), western New Hampshire and adjacent Vermont and Massachusetts Available to Purchase
Age and Origin of the Oliverian Domes, Central-Western New Hampshire Available to Purchase
METAMORPHOSED MIDDLE PALEOZOIC FOSSILS FROM CENTRAL MASSACHUSETTS, EASTERN VERMONT, AND WESTERN NEW HAMPSHIRE Available to Purchase
Seismic studies of floored intrusives in western New Hampshire Available to Purchase
Introduction of potash during regional metamorphism in western New Hampshire Available to Purchase
Evolution of the Bronson Hill arc and Central Maine basin, northern New Hampshire to western Maine: U-Pb zircon constraints on the timing of magmatism, sedimentation, and tectonism Available to Purchase
ABSTRACT The Ordovician Bronson Hill arc and Silurian–Devonian Central Maine basin are integral tectonic elements of the northern Appalachian Mountains (USA). However, understanding the evolution of, and the relationship between, these two domains has been challenging due to complex field relationships, overprinting associated with multiple phases of Paleozoic orogenesis, and a paucity of geochronologic dates. To constrain the nature of this boundary, and the tectonic evolution of the northern Appalachians, we present U-Pb zircon dates from 24 samples in the context of detailed mapping in northern New Hampshire and western Maine. Collectively, the new geochronology and mapping results constrain the timing of magmatism, sedimentation, metamorphism, and deformation. The Bronson Hill arc formed on Gondwana-derived basement and experienced prolonged magmatic activity before and after a ca. 460 Ma reversal in subduction polarity following its accretion to Laurentia in the Middle Ordovician Taconic orogeny. Local Silurian deformation between ca. 441 and 434 Ma may have been related to the last stages of the Taconic orogeny or the Late Ordovician to early Silurian Salinic orogeny. Silurian Central Maine basin units are dominated by local, arc-derived zircon grains, suggestive of a convergent margin setting. Devonian Central Maine basin units contain progressively larger proportions of older, outboard, and basement-derived zircon, associated with the onset of the collisional Early Devonian Acadian orogeny at ca. 410 Ma. Both the Early Devonian Acadian and Middle Devonian to early Carboniferous Neoacadian orogenies were associated with protracted amphibolite-facies metamorphism and magmatism, the latter potentially compatible with the hypothesized Acadian altiplano orogenic plateau. The final configuration of the Jefferson dome formed during the Carboniferous via normal faulting, possibly related to diapirism and/or ductile thinning and extrusion. We interpret the boundary between the Bronson Hill arc and the Central Maine basin to be a pre-Acadian normal fault on which dip was later reversed by dome-stage tectonism. This implies that the classic mantled gneiss domes of the Bronson Hill anticlinorium formed relatively late, during or after the Neoacadian orogeny, and that this process may have separated the once-contiguous Central Maine and Connecticut Valley basins.
STRUCTURE AND METAMORPHISM OF THE KEENE-BRATTLE-BORO AREA, NEW HAMPSHIRE-VERMONT Available to Purchase
Gravity signatures and geometric configurations of some Oliverian plutons: Their relation to Acadian structures Available to Purchase
Geochronologic studies in central New England II: Post-Acadian hinged and differential uplift Available to Purchase
STRATIGRAPHY AND STRUCTURE OF THE MT. PAWTUCKAWAY QUADRANGLE, SOUTHEASTERN NEW HAMPSHIRE Available to Purchase
STRUCTURE AND METAMORPHISM OF THE BELLOWS FALLS QUADRANGLE OF NEW HAMPSHIRE AND VERMONT Available to Purchase
Regional-Scale Mid-Jurassic to Late Cretaceous Unroofing from the Adirondack Mountains through Central New England Based on Apatite Fission-Track and (U-Th)/He Thermochronology Available to Purchase
Mascoma Dome, New Hampshire: An Oliverian gneiss dome Available to Purchase
Location The Mascoma Dome is located in central western New Hampshire about 12 mi (20 km) east of the towns of Lebanonand Hanover (Fig. 1). Groups of outcrops at two localities aredescribed. Most of the major rock units can be seen by visitingeither locality separately, but some relationships between theunits are displayed only at one locality or the other. Both localitiescan be reached by passenger car or by charter bus. This section gives instructions for reaching each group separately. If both locality groups are to be visited on a single trip, the drive from one locality to the other can be shortened considerablyby navigating from the Mt. Cube and Mascoma 15-minutetopography maps. The starting point for reaching both localities is Exit 20 off I-89 about 1 mi (1.6 km) east of the junction of I-89with 1-91. The first locality is at the Dartmouth College Skiway at Holts Ledge in Lyme Center, New Hampshire (Mt. Cube 15-minute Quadrangle). Leave I-89 at Exit 20 and travel north on New Hampshire 12A. In West Lebanon continue northward on New Hampshire 10. On the north side of the village of Lyme, turn right on the unnumbered paved road leading eastwardthrough Lyme Center toward the Skiway. At 1.2 mi (1.9 km) eastof Lyme Center, follow the paved road that forks right to the Skiway. Park in one of the parking lots and walk to the base of the beginner's slope (the southmost trail on the west side of theroad). The trip continues on foot following
Stratigraphy and Structure of the Boundary Mountain Anticlinorium in the Errol Quadrangle, New Hampshire–Maine Available to Purchase
T he Errol quadrangle, New Hampshire–Maine (44° 45′–45° N. lat., 71°–71° 15′ W. long.) is underlain by approximately 27,000 feet of stratified metamorphic rocks that form the core of the Boundary Mountain anticlinorium. Approximately 22,000 feet of these rocks are probably Cambrian and Ordovician, overlain unconformably in the northwest corner of the area by a Siluro-Devonian sequence. The metamorphic rocks were intruded by a batholith of hornblende-biotite granodiorite (Taconic or Acadian) and several stocks of biotite-muscovite adamellite (Acadian). The pre-Silurian stratified rocks, in which the metamorphic grade ranges from the biotite to the sillimanite zone, are divided into three thick formations (from oldest to youngest): the Cambro-Ordovician(?) Aziscohos, the Ordovician (?) Albee, and the Ordovician(?) Dixville Formations. Most of these rocks are metasedimentary, but important metavolcanic units are present in the Dixville Formation and in the Siluro-Devonian sequence. The Aziscohos Formation is tentatively correlated with the Stowe and Ottauquechee Formations of Vermont and with the Mansonville of the Eastern Townships, Quebec. The Albee is traceable along strike to the type Albee in western New Hampshire and is correlated with the lower part of the Moretown Formation of Vermont and the lower part of the Beauceville Formation of the Eastern Townships. The Dixville is correlated with the Partridge and Ammonoosuc Formations of northwestern New Hampshire, the Cram Hill and upper Moretown Formations of Vermont, and the upper Beauceville of the Eastern Townships. The Siluro-Devonian rocks are correlated, at least in part, with the Seboomook Slate of northwestern Maine and the Eastern Townships. The stratified rocks in general trend northeast to north, but a major fold, the Diamond Peaks anticline, dominates the eastern and northeastern part of the area. It is believed to plunge south or southwest. Minor folds and other b lineations throughout most of the area plunge steeply with a strong vertical maximum and are believed to have been formed during a second stage of deformation. Because of the angular unconformity beneath the Siluro-Devonian rocks, it is inferred that broad folding occurred during the Taconic disturbance, although the major orogeny was Acadian.