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Journal
Publisher
Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Atlantic Ocean
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North Atlantic
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Gulf of Mexico (1)
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Australasia
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Australia
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Otway Basin (1)
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New Zealand (1)
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Bald Mountain (3)
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Black Mountain (1)
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Canada
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Eastern Canada
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Newfoundland and Labrador
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Newfoundland
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Burin Peninsula (1)
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Western Canada
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Casper Mountain (2)
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North America
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Rio Grande Rift (1)
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Rocky Mountains
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U. S. Rocky Mountains
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Bighorn Mountains (81)
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Laramie Mountains (3)
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Owl Creek Mountains (7)
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Sangre de Cristo Mountains (1)
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Uinta Mountains (1)
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Wet Mountains (1)
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Wind River Range (5)
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Rocky Mountains foreland (4)
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Rattlesnake Mountain (1)
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Taranaki Basin (1)
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United States
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Arizona
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Maricopa County Arizona (2)
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Bighorn Basin (10)
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California
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Los Angeles County California
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Los Angeles California (1)
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Southern California (1)
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Transverse Ranges (1)
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Cincinnati Arch (1)
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Clark's Fork Basin (1)
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Colorado
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Douglas County Colorado (1)
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Garfield County Colorado (1)
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Piceance Basin (1)
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Wet Mountains (1)
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Denver Basin (1)
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Montana
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Carbon County Montana (2)
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Moxa Arch (1)
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New England (1)
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New Mexico
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Rio Arriba County New Mexico
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Nacimiento Mountains (1)
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Powder River basin (6)
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Sevier orogenic belt (2)
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South Dakota (3)
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U. S. Rocky Mountains
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Absaroka Range
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Beartooth Mountains (5)
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Bighorn Mountains (81)
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Laramie Mountains (3)
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Owl Creek Mountains (7)
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Sangre de Cristo Mountains (1)
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Uinta Mountains (1)
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Wet Mountains (1)
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Wind River Range (5)
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Utah
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Daggett County Utah (1)
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Vermont (1)
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Wyoming
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Big Horn County Wyoming (10)
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Fremont County Wyoming (2)
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Hanna Basin (1)
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Johnson County Wyoming (10)
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Natrona County Wyoming (4)
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Owl Creek Mountains (7)
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Park County Wyoming (1)
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Rock Springs Uplift (1)
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Sheridan County Wyoming (12)
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Sublette County Wyoming
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Pinedale Anticline (1)
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Washakie County Wyoming (4)
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Wind River Range (5)
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Wyoming Province (4)
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Wind River basin (1)
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commodities
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gems (1)
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oil and gas fields (1)
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petroleum
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natural gas
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shale gas (1)
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shale oil (1)
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elements, isotopes
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isotope ratios (3)
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isotopes
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radioactive isotopes
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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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Nd-144/Nd-143 (1)
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O-18/O-16 (1)
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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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Sr-87/Sr-86 (2)
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metals
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alkali metals
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potassium (1)
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alkaline earth metals
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calcium (1)
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magnesium (1)
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strontium
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Sr-87/Sr-86 (2)
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copper (1)
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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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manganese (1)
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molybdenum (1)
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rare earths
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neodymium
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Nd-144/Nd-143 (1)
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-
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silver (1)
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titanium (1)
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vanadium (1)
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noble gases
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helium (2)
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oxygen
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O-18/O-16 (1)
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fossils
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Chordata
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Vertebrata
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Tetrapoda
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Mammalia
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Theria
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Eutheria
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Carnivora (1)
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-
-
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Reptilia
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Diapsida
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Archosauria
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Thecodontia (1)
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Invertebrata
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Arthropoda
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Chelicerata
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Merostomata
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Eurypterida (1)
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Mandibulata
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Crustacea
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Branchiopoda (1)
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Trilobitomorpha
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Trilobita (1)
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Brachiopoda (3)
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Cnidaria
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Hydrozoa (1)
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Protista
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Foraminifera
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Fusulinina (1)
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Vermes
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Annelida (1)
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microfossils
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Conodonta (2)
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Fusulinina (1)
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Plantae
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algae
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Chlorophyta (1)
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geochronology methods
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(U-Th)/He (3)
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fission-track dating (2)
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Rb/Sr (2)
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thermochronology (3)
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U/Pb (1)
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geologic age
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Cenozoic
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Quaternary
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Pleistocene (1)
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Tertiary
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Neogene
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Miocene (1)
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Paleogene
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Eocene
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lower Eocene
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Willwood Formation (1)
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Paleocene
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lower Paleocene
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K-T boundary (1)
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upper Paleocene
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Tiffanian (1)
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-
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Paleocene-Eocene Thermal Maximum (1)
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Wasatch Formation (1)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Cloverly Formation (1)
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-
Upper Cretaceous
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Hell Creek Formation (1)
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K-T boundary (1)
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Lance Formation (1)
-
Parkman Sandstone (1)
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-
-
Jurassic
-
Upper Jurassic
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Morrison Formation (1)
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Sundance Formation (1)
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-
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Triassic
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Upper Triassic (1)
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-
-
Paleozoic
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Cambrian
-
Middle Cambrian
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Flathead Sandstone (2)
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-
-
Carboniferous
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Amsden Formation (1)
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Mississippian
-
Madison Group (3)
-
-
Pennsylvanian
-
Upper Pennsylvanian
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Missourian (1)
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-
-
-
Devonian
-
Lower Devonian
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Pragian (1)
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-
Upper Devonian
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Jefferson Group (2)
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-
-
lower Paleozoic (2)
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Ordovician
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Lower Ordovician (1)
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Upper Ordovician
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Ashgillian (1)
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Bighorn Dolomite (5)
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Cincinnatian (1)
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Hirnantian (1)
-
-
-
Permian
-
Phosphoria Formation (1)
-
-
Tensleep Sandstone (2)
-
-
Phanerozoic (1)
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Precambrian
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Archean
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Neoarchean (1)
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upper Precambrian
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Proterozoic (2)
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igneous rocks
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igneous rocks
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plutonic rocks
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diabase
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quartz diabase (1)
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diorites
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quartz diorites (2)
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granites (1)
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quartz monzonite (2)
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volcanic rocks
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basalts
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tholeiite (1)
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pyroclastics
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tuff (1)
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metamorphic rocks
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metamorphic rocks
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amphibolites (2)
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gneisses (9)
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metaigneous rocks
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metadiabase (6)
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metapyroxenite (1)
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metaplutonic rocks (1)
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schists (1)
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minerals
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arsenates
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carbonates
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calcite (1)
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chromates
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hemihedrite (1)
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halides
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chlorides
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mimetite (1)
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minerals (3)
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oxides
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iron oxides (1)
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phosphates
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apatite (3)
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silicates
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aluminosilicates (1)
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framework silicates
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feldspar group
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alkali feldspar
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microcline (1)
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plagioclase (2)
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silica minerals
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agate (1)
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chalcedony (1)
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quartz (1)
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zeolite group (1)
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orthosilicates
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nesosilicates
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titanite group
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titanite (1)
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zircon group
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zircon (4)
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-
-
-
-
sulfates
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anglesite (1)
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leadhillite (1)
-
-
sulfides
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galena (1)
-
-
-
Primary terms
-
absolute age (5)
-
Atlantic Ocean
-
North Atlantic
-
Gulf of Mexico (1)
-
-
-
Australasia
-
Australia
-
Otway Basin (1)
-
-
New Zealand (1)
-
-
biogeography (2)
-
Canada
-
Eastern Canada
-
Newfoundland and Labrador
-
Newfoundland
-
Burin Peninsula (1)
-
-
-
-
Western Canada
-
Alberta (1)
-
-
-
Cenozoic
-
Quaternary
-
Pleistocene (1)
-
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Eocene
-
lower Eocene
-
Willwood Formation (1)
-
-
-
Paleocene
-
lower Paleocene
-
K-T boundary (1)
-
-
upper Paleocene
-
Tiffanian (1)
-
-
-
Paleocene-Eocene Thermal Maximum (1)
-
Wasatch Formation (1)
-
-
-
-
chemical analysis (1)
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Mammalia
-
Theria
-
Eutheria
-
Carnivora (1)
-
-
-
-
Reptilia
-
Diapsida
-
Archosauria
-
Thecodontia (1)
-
-
-
-
-
-
-
crust (5)
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crystal chemistry (2)
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crystal growth (3)
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crystal structure (2)
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deformation (7)
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diagenesis (2)
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earthquakes (6)
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ecology (1)
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economic geology (2)
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explosions (4)
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faults (22)
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folds (17)
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foliation (3)
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gems (1)
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geochemistry (6)
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geodesy (1)
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geomorphology (1)
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geophysical methods (3)
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heat flow (1)
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hydrogeology (1)
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hydrology (1)
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igneous rocks
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plutonic rocks
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diabase
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quartz diabase (1)
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diorites
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quartz diorites (2)
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granites (1)
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quartz monzonite (2)
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ultramafics (1)
-
-
volcanic rocks
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basalts
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tholeiite (1)
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pyroclastics
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tuff (1)
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-
-
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inclusions (2)
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intrusions (9)
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Invertebrata
-
Arthropoda
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Chelicerata
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Merostomata
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Eurypterida (1)
-
-
-
Mandibulata
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Crustacea
-
Branchiopoda (1)
-
-
-
Trilobitomorpha
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Trilobita (1)
-
-
-
Brachiopoda (3)
-
Cnidaria
-
Hydrozoa (1)
-
-
Protista
-
Foraminifera
-
Fusulinina (1)
-
-
-
Vermes
-
Annelida (1)
-
-
-
isotopes
-
radioactive isotopes
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
stable isotopes
-
Nd-144/Nd-143 (1)
-
O-18/O-16 (1)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
Sr-87/Sr-86 (2)
-
-
-
lineation (1)
-
magmas (1)
-
maps (3)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Cloverly Formation (1)
-
-
Upper Cretaceous
-
Hell Creek Formation (1)
-
K-T boundary (1)
-
Lance Formation (1)
-
Parkman Sandstone (1)
-
-
-
Jurassic
-
Upper Jurassic
-
Morrison Formation (1)
-
Sundance Formation (1)
-
-
-
Triassic
-
Upper Triassic (1)
-
-
-
metals
-
alkali metals
-
potassium (1)
-
-
alkaline earth metals
-
calcium (1)
-
magnesium (1)
-
strontium
-
Sr-87/Sr-86 (2)
-
-
-
copper (1)
-
iron (1)
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
manganese (1)
-
molybdenum (1)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (1)
-
-
-
silver (1)
-
titanium (1)
-
vanadium (1)
-
-
metamorphic rocks
-
amphibolites (2)
-
gneisses (9)
-
metaigneous rocks
-
metadiabase (6)
-
metapyroxenite (1)
-
-
metaplutonic rocks (1)
-
schists (1)
-
-
metamorphism (4)
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metasomatism (4)
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mineralogy (4)
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minerals (3)
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Mohorovicic discontinuity (1)
-
noble gases
-
helium (2)
-
-
North America
-
North American Cordillera (1)
-
Rio Grande Rift (1)
-
Rocky Mountains
-
U. S. Rocky Mountains
-
Absaroka Range
-
Beartooth Mountains (5)
-
-
Bighorn Mountains (81)
-
Laramie Mountains (3)
-
Owl Creek Mountains (7)
-
Sangre de Cristo Mountains (1)
-
Uinta Mountains (1)
-
Wet Mountains (1)
-
Wind River Range (5)
-
-
-
Rocky Mountains foreland (4)
-
Williston Basin (1)
-
-
oil and gas fields (1)
-
orogeny (5)
-
oxygen
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O-18/O-16 (1)
-
-
paleoclimatology (1)
-
paleoecology (1)
-
paleogeography (2)
-
paleontology (7)
-
Paleozoic
-
Cambrian
-
Middle Cambrian
-
Flathead Sandstone (2)
-
-
-
Carboniferous
-
Amsden Formation (1)
-
Mississippian
-
Madison Group (3)
-
-
Pennsylvanian
-
Upper Pennsylvanian
-
Missourian (1)
-
-
-
-
Devonian
-
Lower Devonian
-
Pragian (1)
-
-
Upper Devonian
-
Jefferson Group (2)
-
-
-
lower Paleozoic (2)
-
Ordovician
-
Lower Ordovician (1)
-
Upper Ordovician
-
Ashgillian (1)
-
Bighorn Dolomite (5)
-
Cincinnatian (1)
-
Hirnantian (1)
-
-
-
Permian
-
Phosphoria Formation (1)
-
-
Tensleep Sandstone (2)
-
-
petroleum
-
natural gas
-
shale gas (1)
-
-
shale oil (1)
-
-
petrology (12)
-
Phanerozoic (1)
-
Plantae
-
algae
-
Chlorophyta (1)
-
-
-
Precambrian
-
Archean
-
Neoarchean (1)
-
-
upper Precambrian
-
Proterozoic (2)
-
-
-
remote sensing (3)
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rock mechanics (1)
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sea-level changes (2)
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sedimentary petrology (3)
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sedimentary rocks
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carbonate rocks
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dolostone (1)
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limestone (2)
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clastic rocks
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conglomerate (4)
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marl (1)
-
mudstone (1)
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sandstone (3)
-
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coal (1)
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oil sands (1)
-
-
sedimentary structures
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biogenic structures
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sedimentation (6)
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sediments
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clastic sediments
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gravel (2)
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sand (2)
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silt (1)
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spectroscopy (1)
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stratigraphy (6)
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structural analysis (4)
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structural geology (12)
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tectonics (18)
-
United States
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Arizona
-
Maricopa County Arizona (2)
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Bighorn Basin (10)
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California
-
Los Angeles County California
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Los Angeles California (1)
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Southern California (1)
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Transverse Ranges (1)
-
-
Cincinnati Arch (1)
-
Clark's Fork Basin (1)
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Colorado
-
Douglas County Colorado (1)
-
Elbert County Colorado (1)
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Garfield County Colorado (1)
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Piceance Basin (1)
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Wet Mountains (1)
-
-
Denver Basin (1)
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Montana
-
Carbon County Montana (2)
-
-
Moxa Arch (1)
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New England (1)
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New Mexico
-
Rio Arriba County New Mexico
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Nacimiento Mountains (1)
-
-
-
Powder River basin (6)
-
Sevier orogenic belt (2)
-
South Dakota (3)
-
U. S. Rocky Mountains
-
Absaroka Range
-
Beartooth Mountains (5)
-
-
Bighorn Mountains (81)
-
Laramie Mountains (3)
-
Owl Creek Mountains (7)
-
Sangre de Cristo Mountains (1)
-
Uinta Mountains (1)
-
Wet Mountains (1)
-
Wind River Range (5)
-
-
Utah
-
Daggett County Utah (1)
-
-
Vermont (1)
-
Wyoming
-
Big Horn County Wyoming (10)
-
Fremont County Wyoming (2)
-
Hanna Basin (1)
-
Johnson County Wyoming (10)
-
Natrona County Wyoming (4)
-
Owl Creek Mountains (7)
-
Park County Wyoming (1)
-
Rock Springs Uplift (1)
-
Sheridan County Wyoming (12)
-
Sublette County Wyoming
-
Pinedale Anticline (1)
-
-
Washakie County Wyoming (4)
-
Wind River Range (5)
-
-
Wyoming Province (4)
-
-
-
rock formations
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Chugwater Formation (1)
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Fort Union Formation (4)
-
Goose Egg Formation (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
carbonate rocks
-
dolostone (1)
-
limestone (2)
-
-
clastic rocks
-
conglomerate (4)
-
marl (1)
-
mudstone (1)
-
sandstone (3)
-
-
coal (1)
-
oil sands (1)
-
-
-
sedimentary structures
-
sedimentary structures
-
biogenic structures
-
bioturbation (1)
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sediments
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GeoRef Categories
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Bighorn Mountains
Analysis of the fluvial stratigraphic response to the Paleocene–Eocene Thermal Maximum in the Bighorn Basin, U.S.A. Available to Purchase
The lithospheric folding model applied to the Bighorn uplift during the Laramide orogeny Available to Purchase
ABSTRACT The Bighorn uplift, Wyoming, developed in the Rocky Mountain foreland during the 75–55 Ma Laramide orogeny. It is one of many crystalline-cored uplifts that resulted from low-amplitude, large-wavelength folding of Phanerozoic strata and the basement nonconformity (Great Unconformity) across Wyoming and eastward into the High Plains region, where arch-like structures exist in the subsurface. Results of broadband and passive-active seismic studies by the Bighorn EarthScope project illuminated the deeper crustal structure. The seismic data show that there is substantial Moho relief beneath the surface exposure of the basement arch, with a greater Moho depth west of the Bighorn uplift and shallower Moho depth east of the uplift. A comparable amount of Moho relief is observed for the Wind River uplift, west of the Bighorn range, from a Consortium for Continental Reflection Profiling (COCORP) profile and teleseismic receiver function analysis of EarthScope Transportable Array seismic data. The amplitude and spacing of crystalline-cored uplifts, together with geological and geophysical data, are here examined within the framework of a lithospheric folding model. Lithospheric folding is the concept of low-amplitude, large-wavelength (150–600 km) folds affecting the entire lithosphere; these folds develop in response to an end load that induces a buckling instability. The buckling instability focuses initial fold development, with faults developing subsequently as shortening progresses. Scaled physical models and numerical models that undergo layer-parallel shortening induced by end loads determine that the wavelength of major uplifts in the upper crust occurs at approximately one third the wavelength of folds in the upper mantle for strong lithospheres. This distinction arises because surface uplifts occur where there is distinct curvature upon the Moho, and the vergence of surface uplifts can be synthetic or antithetic to the Moho curvature. In the case of the Bighorn uplift, the surface uplift is antithetic to the Moho curvature, which is likely a consequence of structural inheritance and the influence of a preexisting Proterozoic suture upon the surface uplift. The lithospheric folding model accommodates most of the geological observations and geophysical data for the Bighorn uplift. An alternative model, involving a crustal detachment at the orogen scale, is inconsistent with the absence of subhorizontal seismic reflectors that would arise from a throughgoing, low-angle detachment fault and other regional constraints. We conclude that the Bighorn uplift—and possibly other Laramide arch-like structures—is best understood as a product of lithospheric folding associated with a horizontal end load imposed upon the continental margin to the west.
Calcite twinning strains associated with Laramide uplifts, Wyoming Province Available to Purchase
ABSTRACT We report the results of 167 calcite twinning strain analyses (131 limestones and 36 calcite veins, n = 7368 twin measurements) from the Teton–Gros Ventre (west; n = 21), Wind River ( n = 43), Beartooth ( n = 32), Bighorn ( n = 32), and Black Hills (east; n = 11) Laramide uplifts. Country rock limestones record only a layer-parallel shortening (LPS) strain fabric in many orientations across the region. Synorogenic veins record both vein-parallel shortening (VPS) and vein-normal shortening (VNS) fabrics in many orientations. Twinning strain overprints were not observed in the limestone or vein samples in the supracrustal sedimentary veneer (i.e., drape folds), thereby suggesting that the deformation and uplift of Archean crystalline rocks that form Laramide structures were dominated by offset on faults in the Archean crystalline basement and associated shortening in the midcrust. The twinning strains in the pre-Sevier Jurassic Sundance Formation, in the frontal Prospect thrust of the Sevier belt, and in the distal (eastern) foreland preserve an LPS oriented approximately E-W. This LPS fabric is rotated in unique orientations in Laramide uplifts, suggesting that all but the Bighorn Mountains were uplifted by oblique-slip faults. Detailed field and twinning strain studies of drape folds identified second-order complexities, including: layer-parallel slip through the fold axis (Clarks Fork anticline), attenuation of the sedimentary section and fold axis rotation (Rattlesnake Mountain), rotation of the fold axis and LPS fabric (Derby Dome), and vertical rotations of the LPS fabric about a horizontal axis with 35% attenuation of the sedimentary section (eastern Bighorns). Regional cross sections (E-W) across the Laramide province have an excess of sedimentary veneer rocks that balance with displacement on a detachment at 30 km depth and perhaps along the Moho discontinuity at 40 km depth. Crustal volumes in the Wyoming Province balance when deformation in the western hinterland is included.
Active‐Source Interferometry in Marine and Terrestrial Environments: Importance of Directionality and Stationary Phase Available to Purchase
Rayleigh Wave Propagation in the Bighorn Mountains Region, Wyoming Available to Purchase
Teleseismic P ‐Wave Coda Autocorrelation Imaging of Crustal and Basin Structure, Bighorn Mountains Region, Wyoming, U.S.A. Available to Purchase
Testing a Local‐Distance R g / S g Discriminant Using Observations from the Bighorn Region, Wyoming Available to Purchase
Structural inheritance and the role of basement anisotropies in the Laramide structural and tectonic evolution of the North American Cordilleran foreland, Wyoming Open Access
Using P / S Amplitude Ratios for Seismic Discrimination at Local Distances Available to Purchase
Raygrantite, Pb 10 Zn(SO 4 ) 6 (SiO 4 ) 2 (OH) 2 , a New Mineral Isostructural with Iranite, from the Big Horn Mountains, Maricopa County, Arizona, Usa Available to Purchase
Biotic invasion, niche stability, and the assembly of regional biotas in deep time: comparison between faunal provinces Available to Purchase
Small‐Magnitude Earthquakes in North‐Central Wyoming Recorded during the Bighorn Arch Seismic Experiment Available to Purchase
An Introduction to Low-temperature Thermochronologic Techniques, Methodology, and Applications Available to Purchase
Abstract Low-temperature thermochronometers can be used to measure the timing and the rate at which rocks cool. Generally, rocks cool as they move towards Earth’s surface by erosion or normal faulting (tectonic exhumation of the footwall), or warm as they are buried by sediments and/or thrust sheets, or when they are intruded by magma and association hydrothermal fluids. Changes in heat flow or fluid flow can also cause heating or cooling. Apatite fision-track and apatite (U-Th)/He dating have low closure temperatures of ~120° C and ~70° C respectively, and are used to date cooling in the upper ~3–4 km (~1.8–2.4 mi) of Earth’s crust. Age-elevation relationships from samples collected from different elevations along vertical transects or from wellbores are used to calculate exhumation rates and the time of onset of rapid exhumation. The spatial distribution of cooling ages can be used to map faults in basement or intrusive rocks where faults can be difficult to recognize. Cooling ages from detrital minerals in sedimentary rocks can be used to constrain provenance. If sedimentary samples reached temperatures high enough to reset the thermochronometers, then ages may provide information on the cooling history of the basin. Forward thermal modeling can be used to test proposed thermal history models and predict thermochronometer ages. Inverse thermal modeling finds a best-fit thermal history that provides a good statistical match to measured thermochronometer ages. Both types of thermal modeling may help contrain maximum temperature of the sample and time spent at that temperature. Thermochronometer ages can be used as constraints in basin modeling. Maturation of kerogen to petroleum in a sedimentary basin is controlled by the maximum temperature reached by the kerogen and the amount of time it spends at or near that temperature (i.e., the thermal history of the basin). The timing of tectonics and the formation of structures in a region influence the generation, migration, entrapmet, and preservation of petroleum. Techniques such as low-temperature thermochronology that illuminate the relationship between time and tempearture during basin evolution can be valuable in understanding petroleum systems. These techniques are especially powerful when multiple dating techniques (such as apatite fission-track, zircon fission-track, and apatite (U-Th)/He dating) are applied to the same sample and when they are combined wiht other thermal indicators such as vitrinite reflectance data.
An Overview of Low-temperature Thermochronology in the Rocky Mountains and Its Application to Petroleum System Analysis Available to Purchase
Abstract A synthesis of low-temperature thermochronologic results throughout the Laramide foreland illustrates that samples from wellbores in Laramide basins record either (1) detrital Laramide or older cooling ages in the upper ~1 km (0.62 mi) of the wellbore, with younger ages at greater depths as temperatures increase; or (2) Neogene cooling ages. Surface samples from Laramide ranges typically record either Laramide or older cooling ages. It is apparent that for any particular area the complexity of the cooling history, and hence the tectonic history interpreted from the cooling history, increases as the number of studies or the area covered by a study increases. Most Laramide ranges probably experienced a complex tectono-thermal evolution. Deriving a regional timing sequence for the evolution of the Laramide basins and ranges is still elusive, although a compilation of low-temperature thermochronology data from ranges in the Laramide foreland suggests a younging of the ranges to the south and southwest. Studies of subsurface samples from Laramide basins have, in some cases, been integrated with and used to constrain results from basin burial-history modeling. Current exploration for unconventional shale-oil or shale-gas plays in the Rocky Mountains has renewed interest in thermal and burial history modeling as an aid in evaluating thermal maturity and understanding petroleum systems.This paper suggests that low-temperature thermochronometers are underutilized tools that can provide additional constraints to burial-history modeling and source rock evaluation in the Rocky Mountain region.
The Beaver Creek Detachment System: Syn-Laramide Gravity Detachment and Folding Oblique to Regional Compression Available to Purchase
Abstract Detachment folds basinward of Laramide Rocky Mountain arches are relatively poorly known, partially due to coverage by synorogenic strata that may conceal undiscovered anticlinal fields. This study documents the geometry and kinematics of the Beaver Creek Detachment system (BCD), which is located west of a series of NW-trending thrust faults and folds defining the Beaver Creek reentrant on the western edge of the Bighorn Arch. Possible origins for this proposed detachment include syn-Laramide detachment rooted in mountain-front faulting, syn-Laramide gravity slinding during mountain-front folding, and post-Laramide gravity sliding.