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25 results on '"Denne, Richard"'

22. Biostratigraphic and Geochemical Constraints on the Stratigraphy and Depositional Environments of the Eagle Ford and Woodbine Groups of Texas

Author

Denne, Richard A., primary, Breyer, John A., additional, Kosanke, Tobi H., additional, Spaw, Joan M., additional, Callender, Arden D., additional, Hinote, Russell E., additional, Kariminia, Mohsen, additional, Tur, Nataliya, additional, Kita, Zachary, additional, Lees, Jackie A., additional, and Rowe, Harry, additional

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23. Massive Cretaceous-Paleogene boundary deposit, deep-water Gulf of Mexico: New evidence for widespread Chicxulub-induced slope failure.

Author

Denne, Richard A., Scott, Erik D., Eickhoff, David P., Kaiser, James S., Hill, Ronald J., and Spaw, Joan M.

Subjects
*CRETACEOUS Period, *MESOZOIC Era, *PALEOGENE, *CENOZOIC Era
Abstract

The single largest-known mass wasting deposit has been identified at the Cretaceous-Paleogene (K-Pg) boundary in the deep-water Gulf of Mexico, in 31 industry-drilled wells and on seismic data, corresponding to the "MCU" (middle Cretaceous unconformity) horizon. The deposit has an average thickness of 10-20 m on the upper slope and 90-200 m on the lower slope and basin floor, and is on an unconformity that represents 9 m.y. to 85 m.y. The deposit contains the distinctive association of lithic fragments, impact-derived material, and reworked microfossils (i.e., the Cretaceous-Tertiary boundary "cocktail") associated with the Chicxulub impact, and is predominantly composed of graded pelagic carbonates. These new findings substantiate widespread slope failure induced by the Chicxulub impact and provide further evidence of a single impact coincident with the K-Pg mass extinction. [ABSTRACT FROM AUTHOR]

Published
2013
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25. Who will build the 21st century? Addressing critical demographic gaps in the geosciences.

Author

Cramer, Bradley D., Lewandowski, Katherine J., Goldstein, Arthur, Asher, Pranoti, Ryan, Jeffrey, Schofield, David I., Buchanan, Rex, Denne, Richard, Ausich, William I., Vandenbroucke, Thijs R. A., Lundy, Sherman, Priest, Tyler, and Clark, Ryan J.

Subjects
*EARTH science education, *EARTH scientists, *SKILLED labor supply & demand, *FEDERAL aid to research, *RESEARCH funding
Abstract

The article discusses the critical demographic gaps in the geosciences in the U.S. Topics include the National Bureau of Labor Statistics' projected increase in geoscience jobs by 2022, a projected shortfall of trained geoscientists, and the need to increase the number of geoscience students. The geoscience degrees granted and the federal funding of geoscience as a percentage of total research spending, are also explained.

Published
2015
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