Where: Hot Spring County, Arkansas (34.4° N, 92.8° W: paleocoordinates 38.4° N, 72.2° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Clayton Limestone Formation (Midway Group), Danian (66.0 - 61.6 Ma)
• over 20 m of massive, dark gray
•clays containing invertebrate casts and molds, thin interbedded limestone units, and locally phosphatic, sand and
•pebble lag deposits
Environment/lithology: marine; sandstone
Size classes: macrofossils, mesofossils, microfossils
Preservation: mold/impression, trace, concretion
Primary reference: H. M. Maisch, M. A. Becker, and M. L. Griffiths. 2020. Chondrichthyans from the Lower Clayton Limestone Unit of the Midway Group (Paleocene) near Malvern, Arkansas, USA, with comments on the K/Pg boundary. Palaeontologische Zeitschrift 94:561-593 [P. Holroyd/P. Holroyd/P. Mannion]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 206776: authorized by Patricia Holroyd, entered by Patricia Holroyd on 01.12.2019
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Nodosariata | |
Lenticulina sp. Lamarck 1804 | |
Gastropoda | |
Turritella sp. Lamarck 1799 turret shell | |
Bivalvia | |
Nuculana sp. Link 1807 pointed nut clam | |
Malacostraca | |
| |
Gnathostomata | |
| |
Chondrichthyes | |
Chimaeriformes indet. Obruchev 1953 chimaera | |
Ginglymostoma subafricanum Arambourg 1952 nurse shark | |
Palaeohypotodus rutori sand tiger shark
Odontaspis winkleri Leriche 1905 sand tiger shark | |
Carcharias cf. whitei sand shark
Carcharias sp. Rafinesque 1810 sand shark | |
Palaeogaleus vincenti Daimeries 1889 hound shark | |
Myliobatiformes indet. Compagno 1973 stingray | |
Hypolophites sp. Stromer 1910 whiptail stingray
Dasyatis sp. Rafinesque 1810 whiptail stingray
Dasyatis cf. hexagonalis Arambourg 1952 whiptail stingray | |
Myliobatis sp. Cuvier 1816 eagle ray | |
Rhinoptera sp. Cuvier 1829 cownose ray | |
Gnathostomata | |
Osteichthyes indet. bony fish | |
Reptilia | |
Crocodylia indet. crocodilian | |
Ophiomorpha sp. Lundgren 1891
Gastrochaenolites sp. Leymerie 1842 |