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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Primary terms
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carbon
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Tertiary
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Invertebrata
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Protista
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isotopes
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Pb-206/Pb-204 (3)
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Pb-208/Pb-204 (1)
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stable isotopes
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C-13/C-12 (7)
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D/H (3)
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He-4/He-3 (1)
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O-18/O-16 (7)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (2)
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Mesozoic
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Cretaceous
-
Chonta Formation (1)
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Upper Cretaceous
-
Niobrara Formation (1)
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Vivian Formation (1)
-
-
-
Great Valley Sequence (1)
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Jurassic
-
Lower Jurassic (1)
-
Upper Jurassic
-
Brushy Basin Member (1)
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Morrison Formation (3)
-
-
-
Triassic
-
Upper Triassic
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Chinle Formation (1)
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metal ores
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lead
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Pb-206/Pb-204 (3)
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platinum group
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metamorphic rocks
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oil and gas fields (2)
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O-18/O-16 (7)
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Pacific Ocean
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Zhujiangkou Basin (1)
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West Pacific
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paleoclimatology (3)
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paleogeography (9)
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paleomagnetism (3)
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Paleozoic
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Cambrian
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Lower Cambrian
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Poleta Formation (1)
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Carboniferous
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petroleum
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Phanerozoic (2)
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plate tectonics (11)
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Precambrian
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Johnnie Formation (3)
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Noonday Dolomite (6)
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Johnny M Mine
Geology and Ore Deposits of Johnny M Mine, Ambrosia Lake District, New Mexico
Tartaric Acid Leaching of Selected Ore Samples, Grants Mineral Belt, New Mexico
Exploration for Uranium Deposits in Grants Mineral Belt, New Mexico
Strata of Late Precambrian-Cambrian Age, Death Valley Region, California-Nevada
The Neoproterozoic Noonday Formation, Death Valley region, California
Subsidence history of the Ediacaran Johnnie Formation and related strata of southwest Laurentia: Implications for the age and duration of the Shuram isotopic excursion and animal evolution
Stratigraphic investigations of carbon isotope anomalies and Neoproterozoic ice ages in Death Valley, California
Superposition of two kinematically distinct extensional phases in southern Death Valley: Implications for extensional tectonics
Abstract The Neoproterozoic succession in the Death Valley region contains a physical-and chemo-stratigraphic record of glaciation. Direct evidence for glaciation includes dropstones, glacially influenced diamictites, and cap carbonates in the Neoproterozoic Kingston Peak Formation. Within this formation, glacially influenced deposits and cap carbonates occur at two distinct horizons, suggesting at least two glacial episodes. Cap-like carbonates and sequence boundaries elsewhere in the succession may indicate additional glacial intervals. The basal Beck Spring Dolomite has facies and isotopic characteristics commonly associated with cap carbonates, and the rest of the succession is punctuated by numerous sequence boundaries including a prominent incised horizon in the uppermost Johnnie Formation. This horizon is locally overlain by carbonate with cap-like facies and isotopic characteristics. Together, these observations indicate at least two and possibly four distinct Neoproterozoic glaciations.