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all geography including DSDP/ODP Sites and Legs
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Oligocene (4)
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Primary terms
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absolute age (5)
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Arctic Ocean
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bacteria (1)
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boron (1)
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brines (2)
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carbon
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organic carbon (1)
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Cenozoic
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Quaternary
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Holocene
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upper Holocene (1)
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Mazama Ash (1)
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upper Pleistocene
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Tertiary
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middle Tertiary (2)
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Neogene
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Etchegoin Formation (2)
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Miocene
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Antelope Shale (4)
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Mohnian (1)
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Stevens Sandstone (2)
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Temblor Formation (4)
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upper Miocene (7)
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Pliocene
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lower Pliocene (1)
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upper Pliocene (2)
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upper Neogene (1)
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Paleogene
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Green River Formation (1)
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middle Eocene (1)
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upper Eocene
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Tejon Formation (1)
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Oligocene (4)
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Vaqueros Formation (1)
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Tulare Formation (5)
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upper Cenozoic (2)
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Chordata
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Vertebrata
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Pisces
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Tetrapoda
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Reptilia
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Diapsida
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Lacertilia
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Invertebrata
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Echinodermata
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Mollusca
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Bivalvia
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Heterodonta
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Protista
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Foraminifera (9)
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Radiolaria
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Osculosida
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isotopes
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radioactive isotopes
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Ar-40/Ar-39 (1)
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C-14 (4)
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U-238 (1)
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stable isotopes
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Ar-40/Ar-39 (1)
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deuterium (1)
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Albian (1)
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Berriasian (1)
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Valanginian (1)
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Upper Cretaceous
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Cenomanian (1)
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Forbes Formation (1)
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Maestrichtian (3)
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Moreno Formation (3)
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Senonian (3)
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Turonian (1)
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-
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Franciscan Complex (2)
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Great Valley Sequence (7)
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Jurassic
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Triassic (1)
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upper Mesozoic (1)
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metals
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uranium
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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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arsenic (2)
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manganese (1)
-
-
metamorphic rocks
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metaigneous rocks
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serpentinite (1)
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metasomatic rocks
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serpentinite (1)
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schists
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blueschist (1)
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metamorphism (1)
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noble gases
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nodules (1)
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oil and gas fields (26)
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paleoecology (5)
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paleogeography (6)
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paleontology (6)
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Paleozoic
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Carboniferous
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Mississippian
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Barnett Shale (1)
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-
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Devonian
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Middle Devonian
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Marcellus Shale (1)
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-
-
upper Paleozoic
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Bakken Formation (1)
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-
-
palynomorphs
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megaspores (1)
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miospores
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pollen (1)
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-
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petroleum
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natural gas (8)
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petrology (3)
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Plantae
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algae
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diatoms (4)
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Spermatophyta
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Angiospermae
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Dicotyledoneae
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Leguminosae (2)
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Monocotyledoneae
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plate tectonics (7)
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sedimentary structures
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California
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San Joaquin Valley
Three deep resource plays in the San Joaquin Valley compared with the Bakken Formation
Groundwater salinity in the southern San Joaquin Valley
Produced water disposal injection in the southern San Joaquin Valley: No evidence of groundwater quality effects due to upward leakage
Carbon storage and CO 2 -enhanced oil recovery potential in the Temblor Formation, northeast McKittrick oilfield, San Joaquin Valley, California
Subduction complex uplift and exhumation and its influence on Maastrichtian forearc stratigraphy in the Great Valley Basin, northern San Joaquin Valley, California
Regional-scale assessment of a sequence-bounding paleosol on fluvial fans using ground-penetrating radar, eastern San Joaquin Valley, California
Glacially Driven Cycles in Accumulation Space and Sequence Stratigraphy of a Stream-Dominated Alluvial Fan, San Joaquin Valley, California, U.S.A.
Geologic study and multiple 3-D surveys give clues to complex reservoir architecture of giant Coalinga oil field, San Joaquin Valley, California
Tectonic geomorphology of active folding over buried reverse faults: San Emigdio Mountain front, southern San Joaquin Valley, California
Active tectonics at Wheeler Ridge, southern San Joaquin Valley, California
Dissolved arsenic in the Kern Fan, San Joaquin Valley, California; naturally occurring or anthropogenic?
Systematic Variations in Stress State in the Southern San Joaquin Valley: Inferences Based on Well-Bore Data and Contemporary Seismicity
Texture and Depositional History of Late Pleistocene-Holocene Alluvium in the Central Part of the Western San Joaquin Valley, California
Thermal History of Rocks in Southern San Joaquin Valley, California: Evidence from Fission-Track Analysis
Ultimate Subsidence along Outside Canal in the San Joaquin Valley, California
Growth Fault-Bend Folding at Southeast Lost Hills, San Joaquin Valley, California
The presence beneath the central and western San Joaquin Valley of a large body of confined ground water of lower mineral content than overlying unconfined ground water has long been an enigma to hydrogeologists. The confined waters beneath the diatomaceous Corcoran Clay Member of the Tulare Formation occupy a zone 300 to 730 m thick, are of sodium sulfate composition, and are notably uniform in chemical and stable isotope content as compared to the overlying unconfined water. The confined waters clearly were derived neither from the modern streams of the Coast Ranges to the west, which have higher mineral content, nor solely from streams draining the Sierra Nevada to the east, which contain relatively little sulfate. A paleohydrologic model, consistent with the structural and stratigraphic history of the region, attributes the uniform chemical and isotopic composition of the confined water to mixing and recharge that occurred in temporary lakes during extreme flood events. The confined waters appear to be ancient, probably representing recharge in pre-Corcoran time (older than 615,000 to 725,000 yr B.P.). Low structural relief on the west side of the San Joaquin Valley during much of Pleistocene time, together with small differential head across the thick, poorly permeable, lacustrine Corcoran Clay Member, have combined to preserve the confined paleowaters from being flushed. A combined chemical-stable isotope model suggests that waters with a δ 18 O value of about −10 permil from the Sierra Nevada mixed in intermittent lakes with runoff waters from the then lower Coast Ranges of about −6 permil, resulting in blends of about −9 permil and 450 to 500 mg/L sulfate content in the principal confined aquifer system. Shallower ground waters above the Corcoran Clay Member are more variable in chemical and isotopic composition and appear to represent recharge from streams similar to those now crossing the area.
Textural Composition of Near-Surface Alluvium in West-Central San Joaquin Valley, California
Clay Balls in the West San Joaquin Valley, California
Late Cenozoic stratigraphy and structure of the west margin of the central San Joaquin Valley, California
Upper Pliocene and Quaternary deposits were mapped in an area of 1,800 km 2 in the west-central San Joaquin Valley and adjacent Diablo Range. The upper Pliocene and Pleistocene Tulare Formation, which consists of alluvial sand, gravel, silt, and clay and locally dips 20°, is overlain by a sequence of six units, each 0 to 20 m thick, each the result of an episode of deposition of alluvium from the Diablo Range. Erosional unconformities and soils between the units record the intervening periods. The units consist of unconsolidated gravel, sand, silt, and clay, with textures and sedimentary structures indicating deposition primarily by flowing water and secondardily by mudflows. The lower three units are grouped into the informally designated alluvium of Los Banos, of middle and late Pleistocene age, the two middle units are grouped into the upper Pleistocene alluvium of San Luis Ranch, and the uppermost unit is the Holocene alluvium of Patterson. Holocene arkosic alluvium, derived from the Sierra Nevada and deposited in flood basins along the San Joaquin River, is informally named the alluvium of Dos Palos. The two older units of the alluvium of Los Banos are coeval with broad pediment remnants preserved across the foothills, which indicates that the present elevation of the foothills is due to late Quaternary deformation. These surfaces are deformed into a series of broad, gentle northeast-trending folds that have been displaced more than 100 m along three northwest-trending fault systems. The Ortigalita fault displaces Holocene alluvium and has predominantly strike-slip displacement. The O’Neill fault system is a group of small reverse faults whose fault planes coincide with bedding in the northeast-dipping Great Valley sequence; these faults are interpreted to be sympathetic displacements associated with continued uplift and northeastward tilting of the foothills. The San Joaquin fault, at the foothill-valley margin, vertically displaces the pediments as much as 140 m. The orientation of the fault plane and the magnitude of lateral displacement, however, are not known. Neither the San Joaquin fault nor the O’Neill fault appears to displace the alluvium of San Luis Ranch or younger alluvium.