An integrated study (geochemistry, stable oxygen and carbon isotopes, nannofossils, planktonic foraminifera, inoceramid bivalves, ammonites and crinoids) of the Waxahachie Dam Spillway section, north Texas: a possible boundary stratotype for the base of the Campanian Stage

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Gale, Andrew S., Hancock, Jake M., Kennedy, W. James, Petrizzo, Maria Rose, Lees, Jacqueline A., Walaszczyk, Ireneusz and Wray, David ORCID: 0000-0002-0799-2730 (2007) An integrated study (geochemistry, stable oxygen and carbon isotopes, nannofossils, planktonic foraminifera, inoceramid bivalves, ammonites and crinoids) of the Waxahachie Dam Spillway section, north Texas: a possible boundary stratotype for the base of the Campanian Stage. Cretaceous Research, 29 (1). pp. 131-167. ISSN 0195-6671 (doi:https://doi.org/10.1016/j.cretres.2007.04.006)

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Official URL: http://dx.doi.org/10.1016/j.cretres.2007.04.006

Abstract

The spillway of Lake Waxahachie, Ellis County (Texas), exposes a > 17 m section of the Hutchins Member of the Austin Chalk Group, un-conformably overlain by Taylor Clay. The Austin sequence was regarded as a potential Global Stratotype Section for the base of the Campanian Stage at the 1995 Brussels meeting on Cretaceous Stage boundaries, with the last occurrence of the crinoid Marsupites testudinarius (von Schlotheim, 1820) as the potential boundary marker. An integrated study of the geochemistry, stable carbon and oxgen isotopes, nannofossils, planktonic foraminifera, inoceramid bivalves, ammonites and crinoids of this section place the last occurrence of M. testudinarius in a matrix of eighteen ancillary biostratigraphic markers, while the boundary can also be recognised on the basis of a delta C-13 excursion that can, in principle, be detected globally in marine sediments. A new forma of the crinoid Marsupites testudinarius is introduced. The Waxahachie section fulfils sufficient geological criteria as to be an excellent candidate GSSP for the base of the Campanian Stage, if problems of ownership and access to the section can be resolved.

Item Type:	Article
Additional Information:	[1] Available online 22 November 2007.
Uncontrolled Keywords:	campanian, geochemistry, isotopes, nannofossils, foraminifera, inoceramids
Subjects:	Q Science > QE Geology
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > School of Science (SCI)
Related URLs:	Publisher Organisation
Last Modified:	13 Feb 2020 11:53
URI:	http://gala.gre.ac.uk/id/eprint/2193

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