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- Title
Turtles From an Arkadelphia Formation--Midway Group Lag Deposit (Maastrichtian--Paleocene), Hot Spring County, Arkansas, USA.
- Authors
Becker, Martin A.; Maisch IV, Harry M.; Chamberlain Jr., John A.
- Abstract
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 basalmostMidway 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.
- Subjects
TURTLES; MARINE reptiles; CHONDRICHTHYES
- Publication
Geosciences (2076-3263), 2016, Vol 6, Issue 3, p41
- ISSN
2076-3263
- Publication type
Article
- DOI
10.3390/geosciences6030041