Sedimentary chromium isotopic compositions across the Cretaceous OAE2 at Demerara Rise Site 1258
نویسندگان
چکیده
a Department of Geology and Geophysics, Yale University, New Haven, CT, USA b School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA c Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, USA d Department of Earth Sciences, University of California, Riverside, CA, USA e Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
منابع مشابه
Testing the Cenozoic multisite composite ¡sup¿18¡/sup¿O and ¡sup¿13¡/sup¿C curves: new monospecific Eocene records from a single locality, Demerara Rise (Ocean Drilling
The Open University's repository of research publications and other research outputs Testing the Cenozoic multisite composite ¡sup¿18¡/sup¿O and ¡sup¿13¡/sup¿C curves: new monospecific Eocene records from a single locality, Demerara Rise (Ocean Drilling Program Leg 207) Journal Article (2006). Testing the Cenozoic multisite composite 18O and 13C curves: new monospecific Eocene records from a si...
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[1] Until recently, very few high-quality deep ocean sedimentary sections of Eocene age have been available. Consequently, our understanding of Eocene paleoceanography has become heavily reliant on ‘‘composite’’ records patched together from multiple sites in different ocean basins and generated using multiple taxa (potential sources of ‘‘local’’ noise in the global signal). Here we test the re...
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[1] Mid-Cretaceous (Barremian-Turonian) plankton preserved in deep-sea marl, organic-rich shale, and pelagic carbonate hold an important record of how the marine biosphere responded to shortand long-term changes in the ocean-climate system. Oceanic anoxic events (OAEs) were short-lived episodes of organic carbon burial that are distinguished by their widespread distribution as discrete beds of ...
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Introduction: An up to 2-cm thick Chicxulub ejecta deposit marking the Cretaceous-Tertiary (K/T) boundary (Fig. 1) was recovered in 6 holes drilled during ODP Leg 207 (Demerara Rise, tropical western Atlantic [1-3]). High-resolution mineralogical, petrological, and elemental data reveal a distinct microstratigraphy and a range of ejecta components. Prominent features are the uniformity of this ...
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Isotopic compositions of sulfur and concentrations of sulfur and carbon have been measured for sedimentary rocks across terrestrial Cretaceous-Tertiary (K-T) boundary successions that originated from flood-plain and backswamp environments. Organic carbon contents are relatively constant below the boundary (26 cm for the Dogie Creek section and 9 cm for the Brownie Butte section), but change abr...
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