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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
North Africa
-
Algeria
-
Great Kabylia (1)
-
-
Maghreb (1)
-
Morocco
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Rif (1)
-
-
-
Southern Africa
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Karoo Basin (3)
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Lesotho (2)
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South Africa (1)
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Arctic region
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Greenland
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East Greenland (1)
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Asia
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Arabian Peninsula
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United Arab Emirates
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Ras al-Khaimah (1)
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Far East
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Japan
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Honshu (2)
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Middle East
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Turkey
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Anatolia (1)
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Antalya Turkey (1)
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Siberian Platform (1)
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Tomsk Russian Federation (1)
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West Siberia (1)
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Atlantic Ocean
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North Atlantic
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Bay of Fundy (1)
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Australasia
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Waikato Basin (1)
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Canada
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Eastern Canada
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Maritime Provinces
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Newfoundland and Labrador
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Nunavut
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Queen Elizabeth Islands
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Stikinia Terrane (1)
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Western Canada
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Alberta (4)
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British Columbia
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Cardigan Bay (1)
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Central European Basin (1)
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Commonwealth of Independent States
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Russian Federation
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Europe
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Western Europe
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Nevada
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Utah
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commodities
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elements, isotopes
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carbon
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C-13/C-12 (3)
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isotope ratios (3)
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isotopes
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radioactive isotopes
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Os-187/Os-186 (1)
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stable isotopes
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C-13/C-12 (3)
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O-18/O-16 (1)
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Os-187/Os-186 (1)
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Os-188/Os-187 (1)
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Sr-87/Sr-86 (1)
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metals
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Sr-87/Sr-86 (1)
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platinum group
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iridium (1)
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osmium
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Os-187/Os-186 (1)
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Os-188/Os-187 (1)
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-
-
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oxygen
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O-18/O-16 (1)
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-
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fossils
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Chordata
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Vertebrata
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Pisces
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Osteichthyes (1)
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Tetrapoda
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Reptilia
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Diapsida
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Archosauria
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Pterosauria (1)
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Ichthyosauria (3)
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Squamata
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Synapsida
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Therapsida
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Cynodontia (1)
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ichnofossils (5)
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Invertebrata
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Mandibulata
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Crustacea
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Ostracoda
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Brachiopoda
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Articulata
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Rhynchonellida (1)
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Cnidaria
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Anthozoa (1)
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Echinodermata
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Mollusca
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Bivalvia
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Ostreoidea
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Ostreidae
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Ostrea (1)
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Pterioida
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Pteriina
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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 (2)
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Psiloceratida (2)
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Coleoidea
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Belemnoidea
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Belemnitidae (1)
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-
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Gastropoda (3)
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Protista
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Foraminifera (3)
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Radiolaria (4)
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-
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microfossils
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Conodonta (1)
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palynomorphs
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Dinoflagellata (1)
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miospores
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pollen (1)
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Plantae
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algae
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tracks (2)
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geochronology methods
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geologic age
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Tertiary
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Mesozoic
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Upper Cretaceous
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-
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Glen Canyon Group (1)
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Jurassic
-
Clarens Formation (2)
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Fernie Formation (3)
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Lower Jurassic
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Domerian (1)
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Hettangian (63)
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Holyoke Basalt (2)
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lower Liassic (51)
-
middle Liassic (12)
-
Nordegg Member (2)
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Pliensbachian (12)
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Sinemurian (19)
-
Talkeetna Formation (1)
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Toarcian (12)
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Triassic-Jurassic boundary (5)
-
upper Liassic (10)
-
-
Middle Jurassic
-
Aalenian (4)
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Bajocian (2)
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Bathonian
-
Great Oolite Group (1)
-
-
Callovian (4)
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Dogger (1)
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-
Oxford Clay (3)
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San Rafael Group (1)
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Upper Jurassic
-
Kimmeridge Clay (2)
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Kimmeridgian (2)
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Oxfordian (6)
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Portlandian (2)
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Tithonian (1)
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-
-
Moenave Formation (2)
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Navajo Sandstone (1)
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Passaic Formation (1)
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Sandilands Formation (1)
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Triassic
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Middle Triassic
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Anisian (1)
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Muschelkalk (1)
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-
Upper Triassic
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Carnian (4)
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Chinle Formation (1)
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Norian (5)
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Rhaetian
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Penarth Group (1)
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Stormberg Series (1)
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Triassic-Jurassic boundary (5)
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Precambrian (1)
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igneous rocks
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plutonic rocks
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diabase (1)
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volcanic rocks
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basalts (4)
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pyroclastics
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ignimbrite (1)
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tuff (2)
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metamorphic rocks
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turbidite (1)
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minerals
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phosphates
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apatite (1)
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silicates
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orthosilicates
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nesosilicates
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zircon group
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zircon (4)
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sheet silicates
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clay minerals
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kaolinite (2)
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smectite (1)
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illite (1)
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mica group
-
glauconite (1)
-
-
serpentine group
-
berthierine (1)
-
-
-
-
-
Primary terms
-
absolute age (6)
-
Africa
-
North Africa
-
Algeria
-
Great Kabylia (1)
-
-
Maghreb (1)
-
Morocco
-
Rif (1)
-
-
-
Southern Africa
-
Karoo Basin (3)
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Lesotho (2)
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South Africa (1)
-
-
-
Arctic region
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Greenland
-
East Greenland (1)
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-
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Asia
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Arabian Peninsula
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United Arab Emirates
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Ras al-Khaimah (1)
-
-
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Far East
-
Japan
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Honshu (2)
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-
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Middle East
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Turkey
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Anatolia (1)
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Antalya Turkey (1)
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Taurus Mountains (1)
-
-
-
Siberian Platform (1)
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Tomsk Russian Federation (1)
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West Siberia (1)
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-
Atlantic Ocean
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North Atlantic
-
Bay of Fundy (1)
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-
-
Australasia
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New Zealand
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Taranaki New Zealand (1)
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Waikato Basin (1)
-
-
-
biogeography (5)
-
Canada
-
Eastern Canada
-
Maritime Provinces
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New Brunswick (1)
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Nova Scotia
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Minas Basin (1)
-
-
-
Newfoundland and Labrador
-
Newfoundland (1)
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-
-
Nunavut
-
Sverdrup Basin (1)
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-
Queen Elizabeth Islands
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-
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Stikinia Terrane (1)
-
Western Canada
-
Alberta (4)
-
British Columbia
-
Queen Charlotte Islands (2)
-
-
Canadian Rocky Mountains (1)
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Northwest Territories (1)
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Yukon Territory (1)
-
-
-
carbon
-
C-13/C-12 (3)
-
-
Cenozoic
-
Tertiary
-
Paleogene
-
Paleocene (1)
-
-
-
-
Chordata
-
Vertebrata
-
Pisces
-
Osteichthyes (1)
-
-
Tetrapoda
-
Amphibia
-
Labyrinthodontia
-
Temnospondyli (1)
-
-
-
Reptilia
-
Anapsida
-
Testudines (1)
-
-
Diapsida
-
Archosauria
-
Crocodilia (2)
-
dinosaurs
-
Ornithischia (1)
-
Saurischia
-
Sauropodomorpha (1)
-
Theropoda (1)
-
-
-
Pterosauria (1)
-
Thecodontia
-
Aetosauria (1)
-
-
-
Ichthyosauria (3)
-
Lepidosauria
-
Squamata
-
Lacertilia (1)
-
-
-
-
Synapsida
-
Therapsida
-
Cynodontia (1)
-
-
-
-
-
-
-
clay mineralogy (2)
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climate change (2)
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continental drift (1)
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crust (1)
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data processing (1)
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diagenesis (3)
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Europe
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Alps
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Western Alps (1)
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Carpathians
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Central Europe
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Austria
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Salzkammergut (1)
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-
Germany (2)
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Hungary
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Bakony Mountains (1)
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-
Poland
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Polish Lowland (1)
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Swiety Krzyz Mountains (2)
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Slovakia (1)
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-
Southern Europe
-
Italy
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Apennines
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Northern Apennines (1)
-
-
Calabria Italy (1)
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Marches Italy (1)
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Sardinia Italy (1)
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Umbria Italy (1)
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-
-
Western Europe
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France
-
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Digne France (1)
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Ardeche France (1)
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Loiret France (1)
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United Kingdom
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-
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Scotland (1)
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Wales (2)
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-
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faults (4)
-
folds (1)
-
geochemistry (4)
-
geochronology (2)
-
geophysical methods (2)
-
heat flow (1)
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ichnofossils (5)
-
igneous rocks
-
plutonic rocks
-
diabase (1)
-
-
volcanic rocks
-
basalts (4)
-
pyroclastics
-
ignimbrite (1)
-
tuff (2)
-
-
-
-
intrusions (1)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Malacostraca (1)
-
Ostracoda
-
Podocopida (1)
-
-
-
-
-
Brachiopoda
-
Articulata
-
Rhynchonellida (1)
-
-
-
Cnidaria
-
Anthozoa (1)
-
-
Echinodermata
-
Crinozoa
-
Crinoidea (1)
-
-
-
Mollusca
-
Bivalvia
-
Ostreoidea
-
Ostreidae
-
Ostrea (1)
-
-
-
Pterioida
-
Pteriina
-
Pectinacea
-
Pectinidae (1)
-
-
-
-
-
Cephalopoda
-
Ammonoidea
-
Ammonites (2)
-
Psiloceratida (2)
-
-
Coleoidea
-
Belemnoidea
-
Belemnitidae (1)
-
-
-
-
Gastropoda (3)
-
-
Protista
-
Foraminifera (3)
-
Radiolaria (4)
-
-
-
isotopes
-
radioactive isotopes
-
Os-187/Os-186 (1)
-
-
stable isotopes
-
C-13/C-12 (3)
-
O-18/O-16 (1)
-
Os-187/Os-186 (1)
-
Os-188/Os-187 (1)
-
Sr-87/Sr-86 (1)
-
-
-
lava (4)
-
Mesozoic
-
Antalya Complex (1)
-
Cretaceous
-
Lower Cretaceous
-
Albian (1)
-
Aptian
-
lower Aptian (1)
-
-
Berriasian (1)
-
Neocomian (1)
-
Valanginian (1)
-
-
Upper Cretaceous
-
Turonian (1)
-
-
-
Glen Canyon Group (1)
-
Jurassic
-
Clarens Formation (2)
-
Fernie Formation (3)
-
Lower Jurassic
-
Domerian (1)
-
Hettangian (63)
-
Holyoke Basalt (2)
-
lower Liassic (51)
-
middle Liassic (12)
-
Nordegg Member (2)
-
Pliensbachian (12)
-
Sinemurian (19)
-
Talkeetna Formation (1)
-
Toarcian (12)
-
Triassic-Jurassic boundary (5)
-
upper Liassic (10)
-
-
Middle Jurassic
-
Aalenian (4)
-
Bajocian (2)
-
Bathonian
-
Great Oolite Group (1)
-
-
Callovian (4)
-
Dogger (1)
-
-
Oxford Clay (3)
-
San Rafael Group (1)
-
Upper Jurassic
-
Kimmeridge Clay (2)
-
Kimmeridgian (2)
-
Oxfordian (6)
-
Portlandian (2)
-
Tithonian (1)
-
-
-
Moenave Formation (2)
-
Navajo Sandstone (1)
-
Passaic Formation (1)
-
Sandilands Formation (1)
-
Triassic
-
Middle Triassic
-
Anisian (1)
-
Muschelkalk (1)
-
-
Upper Triassic
-
Carnian (4)
-
Chinle Formation (1)
-
Norian (5)
-
Rhaetian
-
Penarth Group (1)
-
-
Stormberg Series (1)
-
Triassic-Jurassic boundary (5)
-
-
-
-
metals
-
alkaline earth metals
-
strontium
-
Sr-87/Sr-86 (1)
-
-
-
platinum group
-
iridium (1)
-
osmium
-
Os-187/Os-186 (1)
-
Os-188/Os-187 (1)
-
-
-
-
Mexico
-
Chihuahua Mexico (1)
-
Sonora Mexico (1)
-
-
North America
-
Rocky Mountains
-
Canadian Rocky Mountains (1)
-
-
-
oil and gas fields (1)
-
orogeny (1)
-
oxygen
-
O-18/O-16 (1)
-
-
Pacific Coast (1)
-
paleoclimatology (3)
-
paleoecology (10)
-
paleogeography (12)
-
paleomagnetism (4)
-
paleontology (1)
-
palynomorphs
-
Dinoflagellata (1)
-
miospores
-
pollen (1)
-
-
-
petroleum
-
natural gas (1)
-
-
Plantae
-
algae
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Hettangian
The Hettangian–Sinemurian (Lower Jurassic) strata of Redcar, Cleveland Basin, NE England: facies and palaeoecology
Biostratigraphy of the Massospondylus Assemblage Zone (Stormberg Group, Karoo Supergroup), South Africa
UNUSUAL FOSSILIFEROUS CONCRETIONS FROM LACUSTRINE DEPOSITS IN THE LOWER JURASSIC MOENAVE FORMATION IN ST. GEORGE, UTAH, USA: IMPLICATIONS FOR ANCIENT FISH MASS MORTALITIES
Earliest Jurassic U-Pb ages from carbonate deposits in the Navajo Sandstone, southeastern Utah, USA
Historical and Geological Modeling of the Processes of Hydrocarbon Generation in the Hettangian–Aalenian Deposits of the Ust’-Tym Megadepression
ABSTRACT Upper Triassic and Lower to Middle Jurassic strata in the Plomosas uplift of central Chihuahua accumulated in backarc and rift settings, respectively. The succession, as much as ~3250 m thick, consists of four stratigraphic units. The Cerro El Carrizalillo Formation (Carnian–Norian), a volcanic-lithic shallow-marine succession deposited in the (newly named) El Carrizalillo backarc basin, is characterized by predominantly Triassic detrital zircon ages. The overlying Plomosas Formation consists of three members: (1) the Cerro de Enmedio Member (Hettangian–Toarcian), a succession of conglomerate, siltstone, and shallow-marine carbonate strata deposited during the onset of extension in Chihuahua; (2) the Cerro Nevado Ignimbrite Member (176 ± 1 Ma; late Toarcian), a widespread ash-flow tuff; and (3) La Sofía Member (Aalenian–Callovian?), consisting of alluvial-fan conglomerate, fluvial sandstone, tidal sandstone and siltstone, and delta-plain red beds characterized by rapid facies changes, lithic compositions, and diverse Proterozoic, Paleozoic, and Triassic detrital zircon ages characteristic of a rift-basin setting. The extensional basin in which the Cerro de Enmedio and La Sofía members accumulated is termed the Plomosas basin. Improved age control provided by U-Pb maximum depositional ages from detrital zircon and U-Pb zircon analyses of the ignimbrite indicates that the Cerro El Carrizalillo Formation is partly correlative with the Chinle Formation of the Colorado Plateau, and the Plomosas Formation is equivalent to eolianites of the Glen Canyon and San Rafael Groups of the Colorado Plateau. Detrital zircon ages and sandstone textures are consistent with both proximal and distal sediment sources along the Laurentia-Gondwana suture and adjoining Grenville basement of Laurentia, including sources in northern Mexico and the composite Appalachian orogen. Although the depositional setting of the Cerro El Carrizalillo Formation was not connected to fluvial systems of the Chinle Formation, subsequent eolian transport of voluminous sediment to the overlying Cerro de Enmedio and La Sofía members from the Colorado Plateau ergs is suggested by the composition and texture of some sandstone, thick siltstone accumulations, and detrital zircon characteristics that broadly resemble those of the Colorado Plateau eolianites. Thick siltstone in the upper part of La Sofía Member is interpreted as deflated fine-grained sediment that was transported downwind from a time-equivalent erg to accumulate in shallow-marine and coastal-plain settings of the Plomosas basin.
The ‘Last Hurrah of the Reigning Darwinulocopines’? Ostracoda (Arthropoda, Crustacea) from the Lower Jurassic Moenave Formation, Arizona and Utah, USA
A centennial reappraisal of the Vredefort pseudotachylytes: shaken, not stirred by meteorite impact
Eight climatic events can be distinguished in the Triassic–Jurassic (ca. 201 Ma) continental strata of Poland. These events are distinguished by kaolinite/illite ratio, chemical index of alteration (CIA), color of sediments, and palynomorphs. The first transition to wetter climate, evidenced by a shift from smectite- to kaolinite-dominated mudrocks, coincides with the earlier (“precursor”) Rhaetian negative δ 13 C org excursion, which means that the beginning of climate perturbations predates the oldest known Central Atlantic magmatic province flood basalts by some 100–200 k.y. The later global, late Rhaetian “initial” negative δ 13 C org excursion is divided into two subpeaks, each corresponding to hot and humid events, separated by a cooler and drier event. The upper subpeak is also associated with perturbation of the osmium isotope system (attributed to volcanic fallout), and darkened miospores, pointing to acid rains. Between the “initial” excursion and the Triassic-Jurassic boundary interval, five climatic fluctuations are inferred from the changing kaolinite/illite ratio, the last two of which are also associated with an Os isotope perturbation, polycyclic aromatic hydrocarbon (PAH) occurrences, a “spore peak,” and darkened miospores. A series of periodic atmospheric loading events by CO 2 , CH 4 , or alternatively by SO 2 , sulfate aerosols, and toxic compounds, is inferred to have caused this series of rapid climatic reversals and resulting extinction of many less-adapted forms. Just above the palynofloral extinction level, appearance of new forms commenced Jurassic palynofloral recovery. Tetrapod evolution events in the end-Triassic–earliest Jurassic were related to the extinction of the Pseudosuchia, Dicynodontia, Capitosauroidea, Plagiosaroidea, and Rhynchosauria, while appearance of highly diversified tetrapod ichnofauna in the earliest Jurassic strata indicates a rapid recovery and refill of ecological niches by dinosaurs.
Identification of chitin in 200-million-year-old gastropod egg capsules
Proliferation of Oberhauserellidae During the Recovery Following the Late Triassic Extinction: Paleoecological Implications
A new genus and species of polychelid lobster (Crustacea, Decapoda, Eryonidae) from the Early Jurassic (Hettangian) of British Columbia
Belemnites originated in the Triassic—A new look at an old group
Westermann Morphospace displays ammonoid shell shape and hypothetical paleoecology
Jurassic rifting evolution of the Apennines and Southern Alps (Italy): Parallels and differences
A primitive sauropodomorph from the upper Elliot Formation of Lesotho
An early Hettangian coral reef in southern France: Implications for the end-Triassic reef crisis
Gastropod egg capsules preserved on bivalve shells from the Lower Jurassic (Hettangian) of Poland
The Early Jurassic (late Hettangian to early Toarcian) bivalve fauna of the Sierra de Santa Rosa Formation of the Antimonio terrane (Sonora, NW Mexico) is analyzed taxonomically and biogeographically. Fifty taxa are recognized, representing 36 genera and subgenera. Thirty-four of these taxa have not been mentioned from the Jurassic of this region previously. This fauna is of great biogeographical interest, because Early Jurassic bivalves from low paleolatitudes of the tectonically complex western margin of North America are still poorly documented. About half of the described species are also known from other localities along the eastern Pacific margin. The second largest group is composed of widespread taxa, which, in addition to eastern Pacific occurrences, are also reported from other regions, particularly from Europe. The smallest group is endemic taxa that appear to be limited to Sonora during the analyzed time intervals. Geological evidence indicates that the Antimonio terrane was tectonically transported southeastward between the Middle and Late Jurassic from an original position at the southwestern margin of the United States by the Mojave-Sonora megashear. We calculated similarities of contemporaneous pectinoid bivalve faunas from seven eastern Pacific regions to independently constrain Early Jurassic paleolatitudinal positions of this terrane. Cluster analyses and similarity coefficients tentatively suggest that tectonic displacement of the Antimonio terrane toward lower paleolatitudes may already have started in Early Jurassic (Pliensbachian) time.