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Open AccessArticle

Turtles From an Arkadelphia Formation—Midway Group Lag Deposit (Maastrichtian—Paleocene), Hot Spring County, Arkansas, USA

1
Department of Environmental Science, William Paterson University, 300 Pompton Road, Wayne, NJ 07470, USA
2
Doctoral Program in Earth and Environmental Science, City University of New York Graduate Center, 365 Fifth Ave, New York, NY 10016, USA
3
Department of Earth and Environmental Sciences, Brooklyn College, City University of New York, 2900 Bedford Avenue, Brooklyn, NY 11210, USA
1
Arkansas Highway and Transportation Department, Fayetteville, AR, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Jesus Martinez-Frias
Geosciences 2016, 6(3), 41; https://doi.org/10.3390/geosciences6030041
Received: 23 June 2016 / Revised: 18 August 2016 / Accepted: 6 September 2016 / Published: 14 September 2016
The Arkadelphia Formation—Midway Group (Maastrichtian—Paleocene) contact near Malvern, Arkansas preserves a K-Pg boundary assemblage of turtle species consisting of skull, shell, and non-shell postcranial skeletal elements. The Malvern turtles are preserved within a coquina lag deposit that comprises the basalmost Midway Group and also contains an abundance of other reptiles, as well as chondrichthyans, osteichthyans, and invertebrates. This coquina lag deposit records a complex taphonomic history of exhumation and reburial of vertebrate skeletal elements along a dynamic ancestral shoreline in southwestern Arkansas during the late Cretaceous-early Paleocene. Based on stratigraphic occurrence, the Malvern turtle assemblage indicates that these marine reptiles were living at or near the time of the K-Pg mass extinction and represent some of the latest Cretaceous turtles yet recovered from the Gulf Coastal Plain of the United States. View Full-Text
Keywords: turtles; K-Pg boundary section; Arkansas; Arkadelphia Formation; Midway Group turtles; K-Pg boundary section; Arkansas; Arkadelphia Formation; Midway Group
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Becker, M.A.; Maisch, H.M., IV; Chamberlain, J.A., Jr. Turtles From an Arkadelphia Formation—Midway Group Lag Deposit (Maastrichtian—Paleocene), Hot Spring County, Arkansas, USA. Geosciences 2016, 6, 41.

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