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Geochemistry of the Cretaceous Mowry Shale in the Wind River Basin, Wyoming

November 11, 2022

The siliceous nature of the Mowry Shale distinguishes it from many of the well-studied organic-rich mudstones of the Cretaceous Western Interior Seaway. Available models of organic enrichment in mudstones rarely incorporate detailed biomarker, bulk organic, inorganic, and mineralogy data. Here, we used these data to evaluate how variations in organic matter source, productivity, dilution, and preservation modulated organic matter accumulation during the deposition of the Mowry Shale, while also demonstrating the benefits of this integrated approach. An organic stable carbon isotope vertical profile for the Mowry Shale is presented to test whether the Mowry Shale was deposited during oceanic anoxic event 1d (OAE 1d), thereby contributing to organic enrichment in the Mowry Shale.

Citation Information

Publication Year 2022
Title Geochemistry of the Cretaceous Mowry Shale in the Wind River Basin, Wyoming
DOI 10.1130/B36382.1
Authors Katherine L. French, Justin E. Birdwell, Paul G. Lillis
Publication Type Article
Publication Subtype Journal Article
Series Title GSA Bulletin
Index ID 70238549
Record Source USGS Publications Warehouse
USGS Organization Central Energy Resources Science Center