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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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Congo Democratic Republic
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Shaba Congo Democratic Republic (1)
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East Africa
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Tesuque Formation (1)
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Paleogene
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Eocene
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Bridger Formation (1)
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lower Eocene
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middle Eocene
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Santee Limestone (1)
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upper Eocene
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Oligocene
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Brule Formation (1)
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lower Oligocene
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upper Oligocene
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Paleocene
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Ravenscrag Formation (1)
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upper Paleocene
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White River Group (1)
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Sarmiento Formation (2)
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upper Cenozoic (1)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Dinosaur Park Formation (3)
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lower Campanian (1)
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upper Campanian (1)
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Carlile Shale (1)
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Cenomanian
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Codell Sandstone Member (1)
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Horseshoe Canyon Formation (1)
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Judith River Formation (2)
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Lance Formation (1)
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Maestrichtian
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lower Maestrichtian (1)
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upper Maestrichtian (2)
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Milk River Formation (1)
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Moreno Formation (1)
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Oldman Formation (4)
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Santonian (2)
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Senonian (27)
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Weald Clay (1)
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Great Valley Sequence (1)
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Jurassic
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Lower Jurassic
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Upper Jurassic
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Kimmeridgian (2)
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Morrison Formation (3)
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Oxfordian (3)
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Triassic
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Permian-Triassic boundary (4)
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Nicola Group (1)
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Luning Formation (2)
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Stormberg Series (1)
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Paleozoic
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Carrara Formation (1)
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Lower Cambrian
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Terreneuvian
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Middle Cambrian
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Wheeler Formation (1)
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Upper Cambrian
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Orr Formation (1)
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Carboniferous
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Ely Limestone (1)
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Tournaisian (3)
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Upper Mississippian
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Chesterian
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Imo Formation (1)
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Heath Formation (1)
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Serpukhovian (1)
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Namurian (3)
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Pennsylvanian
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Joggins Formation (1)
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Lower Pennsylvanian
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Upper Carboniferous
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Cow Head Group (3)
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Old Red Sandstone (1)
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Zlichovian (1)
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lower Paleozoic
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middle Paleozoic (1)
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Ordovician
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Antelope Valley Limestone (2)
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Upper Ordovician
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Katian (2)
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Permian
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Middle Permian (1)
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Upper Permian
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Permian-Triassic boundary (4)
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Raniganj Formation (1)
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Read Bay Formation (2)
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Silurian
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Llandovery
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Niagaran (1)
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Pridoli (2)
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upper Paleozoic (3)
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Amitsoq Gneiss (1)
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Gunflint Iron Formation (3)
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middle Precambrian (1)
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Proterozoic
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Miette Group (1)
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Paleoproterozoic
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Aphebian (2)
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Sinian
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Dengying Formation (2)
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igneous rocks
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kimberlite (1)
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diabase
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Primary terms
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Dakota Formation (1)
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Lower Cretaceous
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Albian (3)
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Aptian (5)
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Barremian (2)
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Berriasian (1)
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Hauterivian (1)
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Kiowa Formation (1)
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Paluxy Formation (1)
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Trinity Group (1)
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Valanginian (2)
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Middle Cretaceous (2)
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Upper Cretaceous
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Bagh Beds (1)
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Campanian
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Dinosaur Park Formation (3)
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lower Campanian (1)
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upper Campanian (1)
-
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Carlile Shale (1)
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Cenomanian
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Dunvegan Formation (1)
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Codell Sandstone Member (1)
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Eutaw Formation (1)
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Hell Creek Formation (2)
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Hornbrook Formation (1)
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Horseshoe Canyon Formation (1)
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Judith River Formation (2)
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Kodiak Formation (1)
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Ladd Formation (1)
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Lance Formation (1)
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Maestrichtian
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lower Maestrichtian (1)
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upper Maestrichtian (2)
-
-
Milk River Formation (1)
-
Moreno Formation (1)
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Oldman Formation (4)
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Pierre Shale (1)
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Point Loma Formation (1)
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Rosario Formation (1)
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Santonian (2)
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Senonian (27)
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Straight Cliffs Formation (1)
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Turonian (6)
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Two Medicine Formation (1)
-
-
Weald Clay (1)
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-
Great Valley Sequence (1)
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Jurassic
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Clarens Formation (1)
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Fernie Formation (1)
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Lower Jurassic
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lower Liassic (1)
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Pliensbachian (1)
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Sinemurian (1)
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Toarcian (3)
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upper Liassic (3)
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Middle Jurassic
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Bajocian (2)
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Bathonian (3)
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Callovian (2)
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Upper Jurassic
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Brushy Basin Member (1)
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Kimmeridgian (2)
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Morrison Formation (3)
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Naknek Formation (1)
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Oxfordian (3)
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Portlandian (2)
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Tithonian (2)
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-
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Triassic
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Fremouw Formation (1)
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Hawkesbury Sandstone (1)
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Liard Formation (1)
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Lower Triassic
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Permian-Triassic boundary (4)
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Middle Triassic
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Anisian (2)
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Ladinian (2)
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Muschelkalk (2)
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Nicola Group (1)
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Upper Triassic
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Carnian (3)
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Chinle Formation (1)
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Luning Formation (2)
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Norian (4)
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Stormberg Series (1)
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metal ores
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base metals (2)
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chromite ores (3)
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gold ores (9)
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lead-zinc deposits (4)
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metals
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actinides
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thorium (1)
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alkali metals
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rubidium
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Rb-87/Sr-86 (1)
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alkaline earth metals
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barium (2)
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beryllium (1)
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calcium (1)
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magnesium (2)
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radium
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Ra-226 (1)
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Ra-228 (1)
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strontium
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Rb-87/Sr-86 (1)
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Sr-87/Sr-86 (8)
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-
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aluminum (1)
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copper (1)
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gold (3)
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iron
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ferric iron (1)
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lead
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Pb-206/Pb-204 (1)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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molybdenum (1)
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platinum group
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iridium ores (2)
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palladium (1)
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palladium ores (3)
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platinum (1)
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platinum ores (3)
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rhodium ores (1)
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ruthenium ores (1)
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precious metals (2)
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rare earths
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neodymium
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Nd-144/Nd-143 (6)
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scandium (1)
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ytterbium (1)
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yttrium (2)
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silver (1)
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metamorphic rocks
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impactites
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impact breccia
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metaigneous rocks
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serpentinite (1)
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metasomatic rocks
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greisen (1)
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metavolcanic rocks (5)
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schists
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metamorphism (7)
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metasomatism (18)
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meteorites
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stony meteorites
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ordinary chondrites (1)
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Mexico
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micropaleontology (1)
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nitrogen
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North America
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Appalachians
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Basin and Range Province
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Canadian Shield
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Great Lakes region (1)
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Saint Lawrence Lowlands (1)
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Western Interior
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Western Interior Seaway (3)
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Ocean Drilling Program
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Leg 167
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ODP Site 1014 (1)
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ocean floors (3)
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ocean waves (1)
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Oceania
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Polynesia
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oil and gas fields (1)
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oxygen
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O-18/O-16 (5)
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Pacific Ocean
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Manihiki Plateau (1)
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North Pacific
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South Pacific
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Southeast Pacific
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Manihiki Plateau (1)
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Southwest Pacific
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Hikurangi Trough (1)
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West Pacific
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Northwest Pacific (1)
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Ontong Java Plateau (1)
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Pacific region
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Circum-Pacific region (1)
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paleobotany (21)
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paleogeography (28)
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paleontology (178)
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Paleozoic
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Cambrian
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Carrara Formation (1)
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Lower Cambrian
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Atdabanian (1)
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Kinzers Formation (2)
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Poleta Formation (4)
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Terreneuvian
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Fortunian (1)
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Tommotian (4)
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Middle Cambrian
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Barrandian (1)
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Burgess Shale (5)
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Flathead Sandstone (1)
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Wheeler Formation (1)
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Upper Cambrian
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Furongian
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Paibian (1)
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Orr Formation (1)
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Potsdam Sandstone (1)
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Steptoean (1)
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Wilberns Formation (1)
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Wonewoc Formation (1)
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-
-
Carboniferous
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Ely Limestone (1)
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Lower Carboniferous
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Dinantian (8)
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Mississippian
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Bear Gulch Limestone Member (1)
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Lower Mississippian
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Fort Payne Formation (1)
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Osagian
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Burlington Limestone (1)
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Tournaisian (3)
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Middle Mississippian
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Visean (3)
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-
Upper Mississippian
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Chesterian
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Imo Formation (1)
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Heath Formation (1)
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Serpukhovian (1)
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-
-
Namurian (3)
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Pennsylvanian
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Cumberland Group (1)
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Francis Creek Shale (4)
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Joggins Formation (1)
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Lower Pennsylvanian
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Morrowan (2)
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Middle Pennsylvanian
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Allegheny Group (1)
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Atokan (2)
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Carbondale Formation (2)
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Desmoinesian (5)
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Staunton Formation (1)
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-
Upper Pennsylvanian
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Kasimovian (1)
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Missourian (1)
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Virgilian (1)
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-
-
Upper Carboniferous
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Stephanian (1)
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Westphalian (3)
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-
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Cow Head Group (3)
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Devonian
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Ackley Granite (1)
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Guilmette Formation (1)
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Lower Devonian
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Battery Point Formation (1)
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Emsian (7)
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Lochkovian (2)
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Pragian (2)
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Siegenian (3)
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Middle Devonian
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Columbus Limestone (1)
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Eifelian (4)
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Givetian (2)
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Old Red Sandstone (1)
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Swan Hills Formation (1)
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Upper Devonian
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Famennian (3)
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Frasnian (3)
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Zlichovian (1)
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Downtonian (1)
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Ellis Bay Formation (1)
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Horton Group (2)
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lower Paleozoic
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Cape Phillips Formation (3)
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Madera Formation (1)
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Magdalena Group (1)
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Matapedia Group (1)
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middle Paleozoic (1)
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Ordovician
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Antelope Valley Limestone (2)
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Gualcamayo Formation (2)
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Gull River Formation (1)
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Lower Ordovician
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Arenigian (3)
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El Paso Group (1)
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Fillmore Formation (1)
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Tremadocian (2)
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Martinsburg Formation (1)
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Middle Ordovician
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Black River Group (1)
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Blackriverian (1)
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Bromide Formation (1)
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Decorah Shale (1)
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Galena Dolomite (3)
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Llandeilian (1)
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Llanvirnian (1)
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Platteville Formation (1)
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Stones River Group (1)
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Table Head Group (1)
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Whiterockian (2)
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Trenton Group (3)
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Upper Ordovician
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Ashgillian (5)
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Caradocian (2)
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Cincinnatian
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Maysvillian (1)
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Katian (2)
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Maquoketa Formation (3)
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Red River Formation (1)
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Sandbian (1)
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Trentonian (2)
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-
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Permian
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Council Grove Group (1)
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Guadalupian (2)
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Lower Permian
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Autunian (1)
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Cisuralian
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Asselian (1)
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Leonardian (2)
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Wolfcampian
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Hueco Limestone (1)
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-
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Middle Permian (1)
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Red Eagle Limestone (1)
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Upper Permian
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Permian-Triassic boundary (4)
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Raniganj Formation (1)
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-
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Read Bay Formation (2)
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Road River Formation (2)
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Silurian
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Henryhouse Formation (1)
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Lockport Formation (1)
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Lower Silurian
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Llandovery
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Telychian (3)
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Wenlock (5)
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Middle Silurian
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Roberts Mountains Formation (1)
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Rochester Formation (1)
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Waldron Shale (1)
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Niagaran (1)
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Upper Silurian
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Bloomsburg Formation (2)
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Ludlow
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Ludfordian (1)
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Pridoli (2)
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upper Paleozoic (3)
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palynomorphs
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acritarchs
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Hystrichosphaeridae (1)
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Chitinozoa (6)
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Dinoflagellata
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Hystrichosphaeridae (1)
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megaspores (3)
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miospores
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pollen (8)
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problematic palynomorphs (1)
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paragenesis (3)
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petroleum
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Plantae
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Chlorophyta
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Microcodium (1)
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Musci (1)
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Pteridophyta
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Filicopsida
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Equisetales (1)
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Spermatophyta
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Angiospermae
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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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plate tectonics (16)
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Precambrian
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Archean
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Amisk Group (1)
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Amitsoq Gneiss (1)
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Gunflint Iron Formation (3)
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Hadean (1)
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middle Precambrian (1)
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upper Precambrian
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Proterozoic
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Bitter Springs Formation (1)
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Mesoproterozoic
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Miette Group (1)
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Neoproterozoic
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Cryogenian (2)
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Dengying Formation (2)
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Ediacaran (20)
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upper Riphean (1)
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Tonian (1)
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Wilpena Group (1)
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Paleoproterozoic
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Aphebian (2)
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Sinian
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Dengying Formation (2)
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Doushantuo Formation (8)
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problematic fossils
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Calcisphaerulidae (1)
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problematic microfossils (24)
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Pterobranchia (1)
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coal (2)
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United States
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
affinities
Detrital zircon tales between the Rodinia and Pangaea supercontinents; exploring connections between Avalonia, Cadomia and Central Asia Available to Purchase
Problematic tubular fossils from the Portfjeld Formation (Ediacaran) of North Greenland Open Access
Elongate Ediacaran fronds from the Flinders Ranges, South Australia Open Access
Reassessing the diversity, affinity, and construction of terminal Ediacaran tubiform fossils from the La Ciénega Formation, Sonora, Mexico Free
Understanding the unique geochemical behavior of Sc in the interaction with clay minerals Available to Purchase
Mineral and whole-rock geochemistry of high-Al podiform chromitites in the Fizh Massif of the Cretaceous Oman ophiolite: origin of hydrous N-MORB melts in a nascent forearc setting Available to Purchase
Palinspastic restoration of Variscan oroclines – implications for dextral transpression and terrane affinities Available to Purchase
Abstract The Paleozoic Variscan orogen in Europe has a markedly circuitous trace for which several different origins have been postulated, including deformation around promontories on the colliding continental margins, extrusion within the collision zone, folding of a ribbon continent and collision with a substantial dextral component. Adopting the latter assumption, unfolding of the large, steeply plunging folds (‘oroclines’) of Iberia and the Moroccan Meseta requires more than 4000 km of dextral lateral translation of Laurussia with respect to Gondwana. Constraints on the age of the folding require that this lateral translation occurred in mid-late Carboniferous time. Significant dextral translation of Laurussia with respect to Gondwana late in the Variscan collision is supported by palaeomagnetic data for the two supercontinents, although the exact timing of this relative motion is not well constrained due to large uncertainties in the palaeomagnetic pole positions. Our palinspastic reconstruction of the major Variscan folds of Iberia places the rocks of the South Portuguese Zone of western Iberia adjacent to the Rhenish Massif; for instance, as part of Avalonia. By the same token, the Sehoul Block in the Moroccan Meseta probably originated at the western end of Cadomia, although nothing in our analysis precludes it also being derived from Avalonia.
Late Cambrian Pywackia is a cnidarian, not a bryozoan: Insights from skeletal microstructure Open Access
Palynological recovery of small carbonaceous fossils (SCFs) indicates that the late Cambrian acritarch Goniomorpha Yin 1986 represents the teeth of a priapulid worm Available to Purchase
Not the first leech: An unusual worm from the early Silurian of Wisconsin Available to Purchase
A giant dromaeosaurid theropod from the Upper Cretaceous (Turonian) Bissekty Formation of Uzbekistan and the status of Ulughbegsaurus uzbekistanensis Available to Purchase
BIOTIC INTERACTIONS BETWEEN CONULARIIDS AND EPIBIONTS FROM THE SILURIAN WAUKESHA BIOTA Available to Purchase
The angiosperm pollen Volkheimerites labyrinthus gen. et sp. nov. from the earliest Paleogene (Danian) of Patagonia, Argentina Available to Purchase
Sporoderm ultrastructure of some Devonian and Permian representatives of Biharisporites and their botanical affinity Available to Purchase
Melanosclerites from the Late Ordovician to earliest Silurian of Estonia and their palaeogeographical implications Available to Purchase
The Late Ordovician Tafilalt Biota, Anti-Atlas, Morocco: a high-latitude perspective on the GOBE Available to Purchase
Abstract The extensive, predominantly siliciclastic deposits of the Upper Ordovician of the Tafilalt have long been the subject of scientific investigation. In the past 25 years, intensified collecting for commercial purposes has resulted in the discovery of several exceptionally-preserved faunas (Konservat-Lagerstätten) in the Tafilalt region, preserving a range of non-biomineralized and soft-bodied organisms. The preservation of these fossils in the coarse clastic sediments of the Tafilalt is surprising, and in the case of soft-bodied organisms, remarkably similar to the preservational mode of typical Ediacaran biotas. These relatively recent discoveries have increased the scientific significance of the Tafilalt Biota, providing an unparalleled insight into the composition and temporal evolution of the shallow, open-marine ecosystems and their denizens during the later stages of the Great Ordovician Biodiversification Event. At least nine different phyla, in addition to several soft-bodied problematica are represented in the Tafilalt. While the highly diverse and remarkably well-preserved echinoderm and euarthropod faunas are most emblematic for the Tafilalt Biota, further studies have revealed a relatively high diversity of molluscs and brachiopods. Among soft-bodied fossils, the problematic paropsonemid eldonids are iconic for the Tafilalt and stand out both through their abundance, and their wide temporal and geographical range throughout the area.