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The Carbon-Isotopic Composition of Proterozoic Carbonates: Riphean Successions from Northwestern Siberia (Anabar Massif, Turukhansk Uplift)
(Kline Geology Laboratory, Yale University, 1995)
Thick carbonate-dominated successions in northwestern Siberia document secular variations in the C-isotopic composition of seawater through Mesoproterozoic and early Neoproterozoic (Early to early Late Riphean) time, ...
Integrated Chemostratigraphy and Biostratigraphy of the Windermere Supergroup, Northwestern Canada: Implications for Neoproterozoic Correlations and the Early Evolution of Animals
(Geological Society of America, 1994)
The thick, richly fossiliferous succession of the upper Windermere Supergroup, Mackenzie Mountains, northwestern Canada, provides a test of integrated biostratigraphic and chemostratigraphic frameworks in terminal Proterozoic ...
Integrated Approaches to Terminal Proterozoic Stratigraphy: An Example from the Olenek Uplift, northeastern Siberia
(Elsevier, 1995)
In the Olenek Uplift of northeastern Siberia, the Khorbusuonka Group and overlying Kessyusa and Erkeket formations preserve a significant record of terminal Proterozoic and basal Cambrian Earth history. A composite section ...
Delta C-13 Stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: Implications for Regional Lithostratigraphic Correlations
(National Research Council Canada, 1999)
The Bylot Supergroup, northern Baffin Island, contains >1500 m of platform, shelf, and slope carbonates deposited between similar to 1270 and similar to 723 Ma. Limited chronostratigraphic data have led to the broad ...
Isotopes, Ice Ages, and Terminal Proterozoic Earth History
(National Academy of Sciences, 1997)
Detailed correlations of ancient glacial deposits, based on temporal records of carbon acid strontium isotopes in seawater, indicate four (and perhaps five) discrete ice ages in the terminal Proterozoic Eon. The close and ...
Biostratigraphic and Chemostratigraphic Correlation of Neoproterozoic Sedimentary Successions: Upper Tindir Group, Northwestern Canada, as a Test Case
(Geological Society of America, 1992)
Recent advances in Proterozoic micropaleontology and sedimentary isotope geochemistry suggest that improved interbasinal correlation of Neoproterozoic (1000-540 Ma) successions is possible. Because widely varying interpretations ...
Sizing Up the Sub-Tommotian Unconformity in Siberia
(Geological Society of America, 1995)
Sedimentary rocks in the western Anabar region, northwestern Siberia, preserve an exceptional record of evolution and biogeochemical events near the Proterozoic-Cambrian boundary. Carbon isotopic data on petrographically ...
Isotopic Compositions of Carbonates and Organic Carbon from Upper Proterozoic Successions in Namibia: Stratigraphic Variation and the Effects of Diagenesis and Metamorphism
(Elsevier, 1991)
The carbon isotope geochemistry of carbonates and organic carbon in the late Proterozoic Damara Supergroup of Namibia, including the Nama, Witvlei, and Gariep groups on the Kalahari Craton and the Mulden and Otavi groups ...
Neoproterozoic Fossils in Mesoproterozoic Rocks? Chemostratigraphic Resolution of a Biostratigraphic Conundrum from the North China Platform
(Elsevier, 1997)
Siliciclastic rocks of the Ruyang Group, southern Shanxi, and the broadly equivalent Gaoshanhe Group, Shaanxi, contain exceptionally well-preserved, large (empty set approximate to 150 mu m) acanthomorphic acritarchs ...
The Vendian Record of Sr and C Isotopic Variations in Seawater: Implications for Tectonics and Paleoclimate
(Elsevier, 1993)
New Sr and C isotopic data, both obtained on the same samples of marine carbonates, provide a relatively detailed record of isotopic variation in seawater through the latest Proterozoic and allow, for the first time, direct ...