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STRATI 2013Cretaceous–Palaeogene Boundary Events in Texas: New Sections, Revised Micropalaeontological Interpretations, and Clarification of the Stratigraphy

STRATI 2013: Cretaceous–Palaeogene Boundary Events in Texas: New Sections, Revised... [Recent fieldwork (2009–2012) in the Brazos River area, Falls County, Texas, has resulted in the discovery of a number of new exposures that have allowed a reinterpretation of the Cretaceous–Palaeogene boundary events. Our data indicate that there was a single impact event with the seismic shock and resulting tsunami eroding the uppermost Maastrichtian surface, prior to the deposition of a number of storm-generated sandstones, the lower of which contains altered spherules, shell fragments, ichthyolith debris, and reworked microfossils. The overlying lower Palaeocene succession of mudstones and siltstones was deposited in a midshelf setting that is quite similar to that of the preceding uppermost Maastrichtian. The lower Palaeocene appears to record a Milankovitch cyclicity and, potentially, the Dan-C2 hyperthermal event.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

STRATI 2013Cretaceous–Palaeogene Boundary Events in Texas: New Sections, Revised Micropalaeontological Interpretations, and Clarification of the Stratigraphy

Part of the Springer Geology Book Series
Editors: Rocha, Rogério; Pais, João; Kullberg, José Carlos; Finney, Stanley
Hart, Malcolm; Leighton, Andrew; Yancey, Tom; Hampton, Matthew; Liu, Chengjie; Miller, Brent; Smart, Christopher; Twitchett, Richard
STRATI 2013 — Apr 24, 2014
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Publisher
Springer International Publishing
Copyright
© Springer International Publishing Switzerland 2014
ISBN
978-3-319-04363-0
Pages
37 –41
DOI
10.1007/978-3-319-04364-7_8
Publisher site
See Chapter on Publisher Site

Abstract

[Recent fieldwork (2009–2012) in the Brazos River area, Falls County, Texas, has resulted in the discovery of a number of new exposures that have allowed a reinterpretation of the Cretaceous–Palaeogene boundary events. Our data indicate that there was a single impact event with the seismic shock and resulting tsunami eroding the uppermost Maastrichtian surface, prior to the deposition of a number of storm-generated sandstones, the lower of which contains altered spherules, shell fragments, ichthyolith debris, and reworked microfossils. The overlying lower Palaeocene succession of mudstones and siltstones was deposited in a midshelf setting that is quite similar to that of the preceding uppermost Maastrichtian. The lower Palaeocene appears to record a Milankovitch cyclicity and, potentially, the Dan-C2 hyperthermal event.]

Published: Apr 24, 2014

Keywords: Texas; Chicxulub impact; Tsunami; Palaeocene; Foraminifera

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