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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Nile Valley (2)
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Arctic region
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Greenland (1)
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Asia
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Far East
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commodities
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elements, isotopes
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chemical ratios (1)
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hydrogen
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deuterium (1)
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isotope ratios (8)
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C-14 (13)
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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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stable isotopes
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C-13/C-12 (8)
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deuterium (1)
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He-3 (1)
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Nd-144/Nd-143 (1)
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O-18/O-16 (5)
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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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metals
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cadmium (1)
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lead
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rare earths
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zinc (18)
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nitrogen (1)
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noble gases
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helium
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nonmetals (1)
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oxygen
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O-18/O-16 (5)
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phosphorus (1)
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Chordata
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Vertebrata
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Mammalia
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Invertebrata
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Brachiopoda (5)
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Conulariida (1)
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Echinodermata
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Archaeogastropoda (1)
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Protista
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Foraminifera
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microfossils
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Conodonta (5)
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Plantae
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Chlorophyta
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problematic fossils (1)
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geologic age
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upper Pleistocene
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Sangamonian (1)
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Wedron Formation (1)
-
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upper Quaternary (5)
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Tertiary
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Neogene
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Miocene
-
upper Miocene
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Messinian (2)
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Pliocene
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upper Pliocene (1)
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Paleogene
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Eocene
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Absaroka Supergroup (1)
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Paleocene
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lower Paleocene
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K-T boundary (1)
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Laurentide ice sheet (3)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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McMurray Formation (1)
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Upper Cretaceous
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MIS 5 (1)
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Paleozoic
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Bonneterre Formation (3)
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Lamotte Sandstone (2)
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Wonewoc Formation (2)
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Carboniferous
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Lower Mississippian
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Keokuk Limestone (3)
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-
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Redwall Limestone (1)
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Upper Mississippian
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-
Renault Formation (1)
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Meramecian
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Warsaw Formation (2)
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Pride Mountain Formation (1)
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Pennsylvanian
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Devonian
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lower Paleozoic (3)
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Decorah Shale (5)
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Galena Dolomite (7)
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Glenwood Shale (1)
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Millbrig Bentonite Bed (2)
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Platteville Formation (6)
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Saint Peter Sandstone (3)
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Stones River Group (1)
-
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Upper Ordovician
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Ashgillian (1)
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Katian (1)
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Maquoketa Formation (2)
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-
-
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Permian
-
Lower Permian (1)
-
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Sauk Sequence (2)
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Silurian
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Lower Silurian
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Alexandrian (1)
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upper Paleozoic (1)
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Weber Sandstone (1)
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-
upper Precambrian
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Proterozoic
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Neoproterozoic (4)
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Paleoproterozoic (1)
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-
-
-
-
igneous rocks
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igneous rocks
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volcanic rocks
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pyroclastics
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tuff (1)
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volcanic ash (2)
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metamorphic rocks
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K-bentonite (5)
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metamorphic rocks
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metavolcanic rocks (1)
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minerals
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carbonates
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halides
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fluorides
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K-bentonite (5)
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oxides
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iron oxides (1)
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phosphates
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apatite (4)
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silicates
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framework silicates
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feldspar group
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alkali feldspar
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K-feldspar (2)
-
-
-
-
orthosilicates
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nesosilicates
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zircon group
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zircon (3)
-
-
-
-
sheet silicates
-
clay minerals
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smectite (1)
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illite (1)
-
mica group
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glauconite (1)
-
-
-
-
sulfates
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barite (3)
-
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sulfides
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galena (7)
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iron sulfides (1)
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marcasite (1)
-
millerite (1)
-
sphalerite (4)
-
violarite (1)
-
-
-
Primary terms
-
absolute age (20)
-
Africa
-
Nile Valley (2)
-
-
Arctic region
-
Greenland (1)
-
-
Asia
-
Brahmaputra River (2)
-
Far East
-
China (1)
-
-
-
Atlantic Ocean
-
North Atlantic
-
North Sea (1)
-
-
-
barite deposits (4)
-
bentonite deposits (2)
-
bibliography (3)
-
brines (5)
-
Canada
-
Eastern Canada
-
Maritime Provinces
-
Nova Scotia
-
Gays River Deposit (1)
-
-
-
-
Western Canada
-
Alberta (1)
-
Manitoba (1)
-
-
-
carbon
-
C-13/C-12 (8)
-
C-14 (13)
-
-
catalogs (2)
-
Cenozoic
-
Quaternary
-
Holocene
-
lower Holocene (1)
-
upper Holocene (9)
-
-
Pleistocene
-
Illinoian (1)
-
Loveland Loess (2)
-
Peoria Loess (7)
-
Roxana Silt (5)
-
upper Pleistocene
-
Sangamonian (1)
-
Wisconsinan
-
middle Wisconsinan (1)
-
upper Wisconsinan (6)
-
-
-
Wedron Formation (1)
-
-
upper Quaternary (5)
-
-
Tertiary
-
Neogene
-
Miocene
-
upper Miocene
-
Messinian (2)
-
-
-
Pliocene
-
upper Pliocene (1)
-
-
-
Paleogene
-
Eocene
-
Absaroka Supergroup (1)
-
-
Paleocene
-
lower Paleocene
-
K-T boundary (1)
-
-
-
-
-
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Mammalia
-
Theria
-
Eutheria
-
Proboscidea
-
Mastodontoidea (1)
-
-
-
-
-
-
-
-
clay mineralogy (5)
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climate change (2)
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crust (13)
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crystal chemistry (1)
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crystal growth (1)
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data processing (5)
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deformation (5)
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diagenesis (8)
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earthquakes (58)
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economic geology (39)
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education (1)
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epeirogeny (1)
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Europe
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Estonia (1)
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Rhine Basin (1)
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Rhine River (1)
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Western Europe
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Meuse River (1)
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Netherlands
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Limburg Netherlands (1)
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faults (41)
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folds (7)
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foundations (1)
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geochemistry (19)
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geochronology (12)
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geodesy (3)
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geophysical methods (22)
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geophysics (1)
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glacial geology (5)
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government agencies
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survey organizations (1)
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Graptolithina
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Graptoloidea (1)
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ground water (6)
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heat flow (1)
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hydrogen
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D/H (1)
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deuterium (1)
-
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hydrogeology (4)
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hydrology (7)
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ichnofossils (1)
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igneous rocks
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volcanic rocks
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pyroclastics
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tuff (1)
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-
-
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inclusions
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fluid inclusions (11)
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intrusions (4)
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Invertebrata
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Arthropoda
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Mandibulata
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Crustacea
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Ostracoda (1)
-
-
-
Trilobitomorpha
-
Trilobita
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Ptychopariida
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Proetidae (1)
-
-
-
-
-
Brachiopoda (5)
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Cnidaria
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Anthozoa (1)
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Scyphozoa
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Conulariida (1)
-
-
-
Echinodermata
-
Crinozoa
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Blastoidea (3)
-
Crinoidea (3)
-
-
Homalozoa
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Stylophora (1)
-
-
-
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Mississippi Valley
Climate and anthropogenic impacts on North American erosion and sediment transport since the Last Glacial Maximum: Evidence from the detrital zircon record of the Lower Mississippi Valley, USA
Predicting backward erosion piping hazard, Lower Mississippi Valley, USA
ABSTRACT Lithologies, depositional environments, stratigraphic architecture, and conodont biostratigraphy of Lower to Middle Mississippian rocks in the western Ozarks comprise five depositional sequences in ramps on the southern Burlington shelf. Aggradational ramps in the Kinderhookian to early Osagean St. Joe group were relatively strongly overprinted by Ouachita-related tectonism involving inferred recurrent passage of fore-bulge highs and associated basins across central and southern parts of the outcrop area. Significant effects of tectonism are southward facies shallowing onto the broad Kanoka ridge paleotopographic high associated with locally extensive marine and lesser subaerial erosion, sediment thickening and deposition of generally northward down-lapping, resedimented wedges with dislodged reef blocks and conglomerates into relatively rapidly subsiding basins, and formation of a regionally extensive paleosol at the top of the group. Back-stepping subsidence due to middle Osagean foundering of the Kanoka ridge was followed by rapid, long-distance progradation of middle- and outer-ramp facies in the Bentonville and Reeds Spring limestones. Tectonism at this time resulted variously in local folding, uplift, marine and subaerial erosion, and reversal of shelf bathymetry. Southward erosion of the Reeds Spring and Bentonville occurred at least in Oklahoma on rejuvenated segments of the Kanoka ridge. Overlying lower Meramecian limestones are shallow-water deposits truncated by a major unconformity.
Evolution of fluvial meander-belt deposits and implications for the completeness of the stratigraphic record
Testing the early Late Ordovician cool-water hypothesis with oxygen isotopes from conodont apatite
Quaternary Displacement Rates on the Meeman‐Shelby Fault and Joiner Ridge Horst, Eastern Arkansas: Results from Coring Mississippi River Alluvium
Overbank sedimentation from the historic A.D. 2011 flood along the Lower Mississippi River, USA
Connecting the backwater hydraulics of coastal rivers to fluvio-deltaic sedimentology and stratigraphy
Continuity of the Reelfoot Fault across the Cottonwood Grove and Ridgely Faults of the New Madrid Seismic Zone
Formation of the Marianna Gap, A Transverse Stream Valley, through Crowley’s Ridge, Northern Mississippi Alluvial Valley, U.S.A.
Abstract Drilling and geophysical data demonstrate that the Mississippi Valley graben, the Rough Creek graben, and the Rome trough are fault-bounded graben structures filled with as much as 27,000 feet of Cambrian sediments. Data including stratigraphic tops from 1,764 wells, 106 seismic profiles, aeromagnetic and gravity surveys, and mapped surface geology at a 1:24,000 scale have been used to study seven stratigraphic packages resolvable in both wells and seismic profiles across parts of Kentucky, Ohio, Indiana, Illinois, Missouri, and Tennessee. Detailed analyses of the thickness patterns of these stratigraphic packages have been used to interpret the locations and timing of movements along major faults systems in the study area. Active rifting of the Precambrian crystalline bedrock began by the Early Cambrian, and resulted in thick, sand-rich deposits of the Reelfoot Arkose in the Mississippi Valley graben and Rough Creek graben, and the Rome Formation in the Rome trough. Subsidence continued in these grabens during the Middle to Late Cambrian, leading to an alternating succession of shales and carbonates being deposited (Eau Claire Formation of the Illinois basin and Conasauga Group of the Appalachian basin) on top of the coarse clastic Reelfoot Arkose and Rome Formation. Although the tectonic extension that formed these features ended by the Late Cambrian, fault zone reactivation during the Taconic, Acadian, and Alleghenian Orogenies altered fault block orientations and produced areas of basin inversion, creating the possibility of numerous deep structural traps for hydrocarbons sourced by the Cambrian shales of the Eau Claire Formation and Conasauga Group.
Abstract The Reelfoot rift is one segment of a late Proterozoic(?) to early Paleozoic intracontinental rift complex in the south-central United States. The rift complex is situated beneath Mesozoic to Cenozoic strata of the Mississippi embayment of southeastern Missouri, northeastern Arkansas, and western Tennessee and Kentucky. The rift portion of the stratigraphic section consists primarily of synrift Cambrian and Ordovician strata, capped by a postrift sag succession of Late Ordovician to Cenozoic age. Potential synrift source rocks have been identified in the Cambrian Elvins Shale. Thermal maturity of Paleozoic strata within the rift ranges from the oil window to the dry gas window. Petroleum generation in Elvins source rocks likely occurred during the middle to late Paleozoic. Upper Cretaceous sedimentary rocks unconformably overlie various Paleozoic units and define the likely upper boundary of the petroleum system. No production has been established in the Reelfoot rift. However, at least nine of 22 exploratory wells have reported petroleum shows, mainly gas shows with some asphalt or solid hydrocarbon residue. Regional seismic profiling shows the presence of two large inversion structures (Blytheville arch and Pascola arch). The Blytheville arch is marked by a core of structurally thickened Elvins Shale, whereas the Pascola arch reflects the structural uplift of a portion of the entire rift basin. Structural uplift and faulting within the Reelfoot rift since the late Paleozoic appear to have disrupted older conventional hydrocarbon traps and likely spilled any potential conventional petroleum accumulations. The remaining potential resources within the Reelfoot rift are likely shale gas accumulations within the Elvins Shale; however, reservoir continuity and porosity as well as pervasive faulting appear to be significant future challenges for explorers and drillers.