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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Avery Island (1)
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North America
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Basin and Range Province (2)
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Great Plains
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Southern Great Plains (9)
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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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Wet Mountains (1)
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Permian Basin (3)
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United States
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Anadarko Basin (6)
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Arkoma Basin (1)
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Canadian River (1)
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Colorado
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Fremont County Colorado (1)
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Wet Mountains (1)
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Hardeman Basin (2)
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Illinois (1)
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Iowa (1)
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Kansas
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Meade County Kansas (1)
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Llano Estacado (2)
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Midcontinent (1)
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Midwest (1)
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Missouri (1)
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Nebraska
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Garden County Nebraska (1)
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Morrill County Nebraska (1)
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Webster County Nebraska (1)
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New Mexico
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Catron County New Mexico (1)
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Curry County New Mexico (1)
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Datil-Mogollon volcanic field (1)
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Lea County New Mexico (1)
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Quay County New Mexico (1)
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Roosevelt County New Mexico (1)
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Ogallala Aquifer (2)
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Oklahoma
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Le Flore County Oklahoma (1)
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Oklahoma Panhandle (3)
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Pontotoc County Oklahoma (1)
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Wichita Mountains (1)
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Palo Duro Basin (28)
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Pecos River (1)
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Texas
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Amarillo Uplift (3)
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Andrews County Texas (1)
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Armstrong County Texas (3)
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Bailey County Texas (1)
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Briscoe County Texas (4)
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Burleson County Texas (1)
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Cochran County Texas (1)
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Crosby County Texas (6)
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Dalhart Basin (3)
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Dallas County Texas
-
Dallas Texas (1)
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-
Dawson County Texas (1)
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Deaf Smith County Texas (4)
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Donley County Texas (4)
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Edwards Aquifer (1)
-
Fayette County Texas (1)
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Floyd County Texas (3)
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Gaines County Texas (1)
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Garza County Texas (3)
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Hale County Texas (3)
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Hall County Texas (1)
-
Hardeman County Texas (1)
-
Hartley County Texas (1)
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Hockley County Texas (2)
-
Hutchinson County Texas (2)
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Lamb County Texas (2)
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Lee County Texas (1)
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Lubbock County Texas
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Lubbock Lake (1)
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Lubbock Texas (4)
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-
Lynn County Texas (5)
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Martin County Texas (1)
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Midland Basin (5)
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Moore County Texas (3)
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Motley County Texas (1)
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Oldham County Texas (3)
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Potter County Texas
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Amarillo Texas (4)
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Randall County Texas (6)
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Swisher County Texas (7)
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Tarrant County Texas
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Fort Worth Texas (1)
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Terry County Texas (4)
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Texas Panhandle (9)
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Washington County Texas (1)
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West Texas (5)
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U. S. Rocky Mountains
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Wet Mountains (1)
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Wyoming
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Sublette County Wyoming (1)
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Walnut Creek (1)
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commodities
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brines (4)
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energy sources (4)
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metal ores
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uranium ores (1)
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mineral deposits, genesis (1)
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oil and gas fields (4)
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petroleum
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natural gas (2)
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elements, isotopes
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carbon
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C-13/C-12 (1)
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C-14 (2)
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halogens
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bromine
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bromide ion (1)
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chlorine
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chloride ion (3)
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hydrogen
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D/H (2)
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deuterium (1)
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isotope ratios (2)
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isotopes
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radioactive isotopes
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C-14 (2)
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stable isotopes
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C-13/C-12 (1)
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D/H (2)
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deuterium (1)
-
O-18/O-16 (2)
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S-34/S-32 (1)
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Sr-87/Sr-86 (1)
-
-
-
metals
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alkaline earth metals
-
magnesium (1)
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strontium
-
Sr-87/Sr-86 (1)
-
-
-
-
oxygen
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O-18/O-16 (2)
-
-
sulfur
-
S-34/S-32 (1)
-
-
-
fossils
-
Chordata
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Vertebrata
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Pisces
-
Chondrichthyes
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Elasmobranchii (2)
-
-
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Tetrapoda
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Amphibia
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Labyrinthodontia
-
Temnospondyli (1)
-
-
-
Mammalia
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Theria
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Eutheria
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Artiodactyla
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Ruminantia
-
Bovidae
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Bison
-
Bison occidentalis (1)
-
-
-
Tylopoda
-
Camelidae (1)
-
-
-
-
-
-
-
-
-
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda
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Podocopida
-
Cypridocopina
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Cyprididae (1)
-
-
-
-
-
-
-
Mollusca (1)
-
Protista
-
Foraminifera
-
Fusulinina
-
Fusulinidae (1)
-
-
-
-
-
microfossils
-
Conodonta (1)
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Fusulinina
-
Fusulinidae (1)
-
-
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Plantae
-
algae
-
diatoms (1)
-
-
Spermatophyta
-
Angiospermae (1)
-
-
-
-
geochronology methods
-
(U-Th)/He (1)
-
Ar/Ar (1)
-
optically stimulated luminescence (1)
-
paleomagnetism (2)
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Rb/Sr (1)
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thermoluminescence (1)
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U/Pb (1)
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geologic age
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Cenozoic
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Blancan (1)
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Quaternary
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Holocene (1)
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lower Quaternary (1)
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Pleistocene
-
Blackwater Draw Formation (4)
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upper Pleistocene
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Wisconsinan (1)
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-
-
upper Quaternary (2)
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Tertiary
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Neogene
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Miocene
-
upper Miocene (1)
-
-
Ogallala Formation (8)
-
Pliocene
-
upper Pliocene
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Rexroad Formation (1)
-
-
-
-
-
upper Cenozoic (1)
-
-
Mesozoic
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Cretaceous
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Upper Cretaceous
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Gulfian
-
Austin Chalk (2)
-
Taylor Marl (1)
-
-
-
-
Triassic
-
Upper Triassic
-
Carnian (1)
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Dockum Group (7)
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Norian (1)
-
-
-
-
Paleozoic
-
Bird Spring Formation (1)
-
Cambrian (1)
-
Carboniferous
-
Mississippian (2)
-
Pennsylvanian
-
Upper Pennsylvanian
-
Canyon Group (1)
-
Virgilian (2)
-
-
-
-
Ordovician (1)
-
Permian
-
Guadalupian
-
Seven Rivers Formation (1)
-
Tansill Formation (2)
-
-
Lower Permian
-
Leonardian
-
Clear Fork Group (4)
-
-
Wichita Group (2)
-
Wolfcampian (3)
-
-
Upper Permian
-
Salado Formation (2)
-
-
-
upper Paleozoic (1)
-
-
Phanerozoic (1)
-
Precambrian
-
upper Precambrian
-
Proterozoic (1)
-
-
-
-
igneous rocks
-
igneous rocks
-
plutonic rocks
-
granites (1)
-
-
volcanic rocks
-
rhyolites (1)
-
-
-
-
metamorphic rocks
-
turbidite (2)
-
-
meteorites
-
meteorites
-
stony meteorites
-
chondrites
-
ordinary chondrites
-
L chondrites (1)
-
-
-
-
-
-
minerals
-
carbonates
-
dolomite (1)
-
-
halides
-
chlorides
-
halite (5)
-
-
-
minerals (1)
-
oxides
-
cryptomelane (1)
-
hollandite (1)
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spinel group (1)
-
-
silicates
-
orthosilicates
-
nesosilicates
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zircon group
-
zircon (1)
-
-
-
-
sheet silicates
-
clay minerals
-
smectite (1)
-
-
illite (1)
-
mica group
-
glauconite (1)
-
-
-
-
sulfates
-
anhydrite (4)
-
gypsum (1)
-
-
-
Primary terms
-
absolute age (5)
-
brines (4)
-
carbon
-
C-13/C-12 (1)
-
C-14 (2)
-
-
Cenozoic
-
Blancan (1)
-
Quaternary
-
Holocene (1)
-
lower Quaternary (1)
-
Pleistocene
-
Blackwater Draw Formation (4)
-
upper Pleistocene
-
Wisconsinan (1)
-
-
-
upper Quaternary (2)
-
-
Tertiary
-
Neogene
-
Miocene
-
upper Miocene (1)
-
-
Ogallala Formation (8)
-
Pliocene
-
upper Pliocene
-
Rexroad Formation (1)
-
-
-
-
-
upper Cenozoic (1)
-
-
Chordata
-
Vertebrata
-
Pisces
-
Chondrichthyes
-
Elasmobranchii (2)
-
-
-
Tetrapoda
-
Amphibia
-
Labyrinthodontia
-
Temnospondyli (1)
-
-
-
Mammalia
-
Theria
-
Eutheria
-
Artiodactyla
-
Ruminantia
-
Bovidae
-
Bison
-
Bison occidentalis (1)
-
-
-
Tylopoda
-
Camelidae (1)
-
-
-
-
-
-
-
-
-
-
clay mineralogy (1)
-
crystal growth (1)
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data processing (2)
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deformation (4)
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diagenesis (3)
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earthquakes (2)
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economic geology (9)
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energy sources (4)
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engineering geology (6)
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environmental geology (1)
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epeirogeny (1)
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faults (4)
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foundations (1)
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fractures (3)
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geochemistry (7)
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geochronology (1)
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geomorphology (5)
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geophysical methods (9)
-
ground water (7)
-
hydrogen
-
D/H (2)
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deuterium (1)
-
-
hydrogeology (3)
-
igneous rocks
-
plutonic rocks
-
granites (1)
-
-
volcanic rocks
-
rhyolites (1)
-
-
-
inclusions
-
fluid inclusions (3)
-
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda
-
Podocopida
-
Cypridocopina
-
Cyprididae (1)
-
-
-
-
-
-
-
Mollusca (1)
-
Protista
-
Foraminifera
-
Fusulinina
-
Fusulinidae (1)
-
-
-
-
-
isotopes
-
radioactive isotopes
-
C-14 (2)
-
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stable isotopes
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C-13/C-12 (1)
-
D/H (2)
-
deuterium (1)
-
O-18/O-16 (2)
-
S-34/S-32 (1)
-
Sr-87/Sr-86 (1)
-
-
-
land subsidence (1)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Gulfian
-
Austin Chalk (2)
-
Taylor Marl (1)
-
-
-
-
Triassic
-
Upper Triassic
-
Carnian (1)
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Dockum Group (7)
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Norian (1)
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-
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metal ores
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uranium ores (1)
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metals
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alkaline earth metals
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magnesium (1)
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strontium
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Sr-87/Sr-86 (1)
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metasomatism (1)
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meteorites
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stony meteorites
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ordinary chondrites
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mineral deposits, genesis (1)
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mineralogy (3)
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minerals (1)
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North America
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Basin and Range Province (2)
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Great Plains
-
Southern Great Plains (9)
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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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Wet Mountains (1)
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-
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oil and gas fields (4)
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oxygen
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O-18/O-16 (2)
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paleobotany (1)
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paleoclimatology (8)
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paleoecology (3)
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paleogeography (3)
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paleomagnetism (2)
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paleontology (4)
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Paleozoic
-
Bird Spring Formation (1)
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Cambrian (1)
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Carboniferous
-
Mississippian (2)
-
Pennsylvanian
-
Upper Pennsylvanian
-
Canyon Group (1)
-
Virgilian (2)
-
-
-
-
Ordovician (1)
-
Permian
-
Guadalupian
-
Seven Rivers Formation (1)
-
Tansill Formation (2)
-
-
Lower Permian
-
Leonardian
-
Clear Fork Group (4)
-
-
Wichita Group (2)
-
Wolfcampian (3)
-
-
Upper Permian
-
Salado Formation (2)
-
-
-
upper Paleozoic (1)
-
-
petroleum
-
natural gas (2)
-
-
Phanerozoic (1)
-
Plantae
-
algae
-
diatoms (1)
-
-
Spermatophyta
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Angiospermae (1)
-
-
-
plate tectonics (1)
-
pollution (1)
-
Precambrian
-
upper Precambrian
-
Proterozoic (1)
-
-
-
reefs (1)
-
remote sensing (2)
-
rock mechanics (1)
-
sea-level changes (2)
-
sedimentary petrology (4)
-
sedimentary rocks
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carbonate rocks
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dolostone (1)
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limestone (1)
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-
chemically precipitated rocks
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evaporites
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salt (6)
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-
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clastic rocks
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mudstone (2)
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red beds (3)
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sandstone (2)
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shale (3)
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siltstone (1)
-
-
-
sedimentary structures
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planar bedding structures
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bedding (1)
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secondary structures
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stylolites (1)
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sedimentation (15)
-
sediments
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clastic sediments
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alluvium (3)
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dust (1)
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loess (1)
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seismology (1)
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soils (6)
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stratigraphy (11)
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structural analysis (1)
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structural geology (4)
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sulfur
-
S-34/S-32 (1)
-
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tectonics
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neotectonics (1)
-
-
United States
-
Anadarko Basin (6)
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Arkoma Basin (1)
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Canadian River (1)
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Colorado
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Fremont County Colorado (1)
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Wet Mountains (1)
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Hardeman Basin (2)
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Illinois (1)
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Iowa (1)
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Kansas
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Meade County Kansas (1)
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Llano Estacado (2)
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Midcontinent (1)
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Midwest (1)
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Missouri (1)
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Nebraska
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Garden County Nebraska (1)
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Morrill County Nebraska (1)
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Webster County Nebraska (1)
-
-
New Mexico
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Catron County New Mexico (1)
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Curry County New Mexico (1)
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Datil-Mogollon volcanic field (1)
-
Lea County New Mexico (1)
-
Quay County New Mexico (1)
-
Roosevelt County New Mexico (1)
-
-
Ogallala Aquifer (2)
-
Oklahoma
-
Le Flore County Oklahoma (1)
-
Oklahoma Panhandle (3)
-
Pontotoc County Oklahoma (1)
-
Wichita Mountains (1)
-
-
Palo Duro Basin (28)
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Pecos River (1)
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Texas
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Amarillo Uplift (3)
-
Andrews County Texas (1)
-
Armstrong County Texas (3)
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Bailey County Texas (1)
-
Briscoe County Texas (4)
-
Burleson County Texas (1)
-
Cochran County Texas (1)
-
Crosby County Texas (6)
-
Dalhart Basin (3)
-
Dallas County Texas
-
Dallas Texas (1)
-
-
Dawson County Texas (1)
-
Deaf Smith County Texas (4)
-
Donley County Texas (4)
-
Edwards Aquifer (1)
-
Fayette County Texas (1)
-
Floyd County Texas (3)
-
Gaines County Texas (1)
-
Garza County Texas (3)
-
Hale County Texas (3)
-
Hall County Texas (1)
-
Hardeman County Texas (1)
-
Hartley County Texas (1)
-
Hockley County Texas (2)
-
Hutchinson County Texas (2)
-
Lamb County Texas (2)
-
Lee County Texas (1)
-
Lubbock County Texas
-
Lubbock Lake (1)
-
Lubbock Texas (4)
-
-
Lynn County Texas (5)
-
Martin County Texas (1)
-
Midland Basin (5)
-
Moore County Texas (3)
-
Motley County Texas (1)
-
Oldham County Texas (3)
-
Potter County Texas
-
Amarillo Texas (4)
-
-
Randall County Texas (6)
-
Swisher County Texas (7)
-
Tarrant County Texas
-
Fort Worth Texas (1)
-
-
Terry County Texas (4)
-
Texas Panhandle (9)
-
Washington County Texas (1)
-
West Texas (5)
-
-
U. S. Rocky Mountains
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Wet Mountains (1)
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-
Wyoming
-
Sublette County Wyoming (1)
-
-
-
waste disposal (12)
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weathering (1)
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rock formations
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San Andres Formation (4)
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-
sedimentary rocks
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oolite (1)
-
sedimentary rocks
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carbonate rocks
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dolostone (1)
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limestone (1)
-
-
chemically precipitated rocks
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evaporites
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salt (6)
-
-
-
clastic rocks
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mudstone (2)
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red beds (3)
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sandstone (2)
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shale (3)
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siltstone (1)
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-
-
siliciclastics (1)
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turbidite (2)
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volcaniclastics (1)
-
-
sedimentary structures
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sedimentary structures
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planar bedding structures
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bedding (1)
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-
secondary structures
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stylolites (1)
-
-
-
-
sediments
-
oolite (1)
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sediments
-
clastic sediments
-
alluvium (3)
-
dust (1)
-
loess (1)
-
-
-
siliciclastics (1)
-
turbidite (2)
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volcaniclastics (1)
-
-
soils
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paleosols (5)
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soils (6)
-
This article utilizes over 3000 biostratigraphic reports of fusulinid taxa in the Midland Basin to produce a series of chronostratigraphic surfaces that show shelf-to-basin profiles from the end of the Atokan to the end of the Leonardian. The position of the shelf-edge break along the Eastern Shelf was geometrically reconstructed for each of the chronostratigraphic surfaces. Comparing the location of the shelf edges produced in this study to published examples resulted in significant disagreement for some time intervals, especially the Wolfcampian. These discrepancies are inferred to be predominantly the result of lithostratigraphic-based vs. biostratigraphic-based data. Assessing shelf-edge trajectory through the Pennsylvanian into the early Permian indicates that (1) tectonic and eustatic increases in shelf accommodation resulted in retrogradation of the shelf edge during the Pennsylvanian, and (2) early Permian progradation was the likely result of cessation in tectonic subsidence that allowed bypass of the shelf and passive filling of the basin center. When placed into the context of the Ancestral Rocky Mountains, subsidence analysis of the Midland Basin agrees with tectonic models that portray a synchronous start rather than an east-to-west migration of peak subsidence. Additionally, a relatively synchronous apex of tectonic subsidence occurred in the Middle to Late Pennsylvanian.
Analysis of wastewater injection and prospect regions for induced seismicity in the Texas panhandle, United States
ABSTRACT The mid-Pleistocene transition is a time interval between ca. 1.2 and 0.7 Ma during which a shift occurred from ~41 k.y. glacial-interglacial cycles to ~100 k.y. cycles. Although the mid-Pleistocene transition has been well documented in global marine records, its effects in continental environments, including North America, are incompletely understood owing to the paucity of terrestrial sediment records spanning the entire Quaternary. A notable exception is the ca. 1.4 Ma and younger Blackwater Draw Formation, an extensive eolian sequence on the Southern High Plains of the United States. Intervals of the Blackwater Draw Formation section that are inferred to span the mid-Pleistocene transition can be divided into pre–, syn–, and post–mid-Pleistocene transition parts. Weathering profiles in the pre–mid-Pleistocene transition section are dominated by weakly developed soils formed in arid environments, as evidenced by well-expressed pedogenic carbonate horizons, lack of clay formation during hydrolysis, and magnetically soft, coarse-grained magnetite/maghemite populations. Conversely, the syn– and post–mid-Pleistocene transition intervals demonstrate an increase in weathering intensity by an abrupt increase in clay content formed in part by hydrolysis of feldspars, soil profiles that demonstrate leaching and illuviation, and a fining-upward grain size of the magnetite/maghemite population. Sedimentologic, geochemical, and rock-magnetic data are consistent with a southern and coarser sediment source derived from the Pecos River drainage prior to the mid-Pleistocene transition, followed by a mixture of northern and southern sources during and after the mid-Pleistocene transition. Overall, our results indicate that pre–mid-Pleistocene transition conditions on the Southern High Plains were arid with wind energy sufficient to mobilize sand sheets out of the Pecos River and deposit them on the plateau. The syn– and post–mid-Pleistocene transition environments reflect somewhat wetter conditions and potentially an influx of silt from the north, in addition to continued sand derived from the Pecos River valley. The wetter conditions and silt influx may have resulted from longer-lived and more robust glacial activity in the Northern Hemisphere that characterized the post–mid-Pleistocene transition Earth system.
Abstract: The “Wolfcamp Shale” of the Permian Basin in west Texas is a prime source of oil reserves within the USA. Despite its growing importance, definitive ages and stratigraphic correlations across the basin remain unclear. Fusulinid studies have assigned an approximate age of Late Pennsylvanian (Missourian) to early Permian (Leonardian) for the “Wolfcamp Shale,” but exact horizons for regional stage boundaries are not well defined. Analysis of conodont specimens from three cored basinal shale intervals of the Shell Stevens L1V well in the northern part of the Midland Basin (Lynn County, Texas) improves interpretation of regional stage boundaries within the “Wolfcamp Shale” and provides an accurate means of correlation to depositional cycles on the Eastern Shelf in central Texas. Conodont biostratigraphic markers were compared to log correlations and sequence stratigraphic correlations. Associated gamma-ray (GR) and resistivity (RES) logs show distinct log markers for the Pennsylvanian–Permian boundary and base of the Leonardian Stage that are traceable to immediately adjacent wells and possibly to portions of the southern part of the Midland Basin. Third- and fourth-order sequence stratigraphic cycles were delineated using core lithology, conodont abundances, and gamma-ray and resistivity readings. These sequences are linked to those observed in the Eastern Shelf stratigraphic sections and provide a useful secondary mode of correlation.
Natural and Induced Seismicity in the Texas and Oklahoma Panhandles
The value of constrained conjugate-gradient least-squares migration in seismic inversion: Application to a fractured-basement play, Texas Panhandle
Abstract The Permian (Leonardian) Upper Spraberry Formation in the Happy Field of Garza County, Texas, contains an excellent example of a reservoir composed of resedimented carbonates in a deep-water slope-basin setting. The field has one of the most complete data sets of any producing deep-water carbonate reservoir known, including 15 whole cores with matching full suites of electric logs, and high-resolution three-dimensional (3D) seismic data. Sequence stratigraphic analysis combined with detailed characterization of analogous outcrops, detailed core-based sedimentology, and well-log analysis indicate that the Happy Field ooid fans are positioned within the transgressive systems tract of the fifth composite sequence in the Leonardian. The main reservoir facies are resedimented ooid and skeletal grainstone hyperconcentrated density flows that were focused downslope through a probable reentrant in the shelf margin and deposited in a long-lived topographic depression at the toe-of-slope. Vertical heterogeneity is set up by laterally extensive shale and silt beds that punctuate the oolitic density flows. Lateral heterogeneity and compartmentalization within the reservoir are created by younger mixed carbonate-siliciclastic debris flows that are highly erosive and are characterized by relatively low permeability.