Sample B2, NDGS L140, Logan County (Cretaceous of the United States)

Where: Logan County, North Dakota (46.5° N, 99.6° W: paleocoordinates 51.8° N, 72.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Fox Hills Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: paralic; poorly lithified, fine-grained sandstone

• Shoreline sandstone. Contained tidal-flat marine invertebrates, estuarine invertebrates such as oysters, an occasional freshwater snail (Physa sp.), as well as a mix of vertebrates from multiple habitats.
• Poorly consolidated fine-grained sandstone

Size class: macrofossils

Collection methods: bulk, sieve

• Repository: North Dakota State Fossil Collection at the North Dakota Heritage Center (State Museum)

Primary reference: J. W. Hoganson, J. M. Erickson, and F. D. Holland. 2019. Chondrichthyan and osteichthyan paleofaunas from the Cretaceous (Late Maastrichtian) Fox Hills Formation of North Dakota, USA: paleoecology, paleogeography, and extinction. Bulletins of American Paleontology 398:1-94 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 213586: authorized by Matthew Clapham, entered by Matthew Clapham on 06.09.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Actinopteri
 Aulopiformes - Enchodontidae
Enchodus cf. ferox, Enchodus dirus
Enchodus cf. ferox Leidy 1855
Enchodus dirus Leidy 1857
Chondrichthyes
 Lamniformes - Carchariidae
Carcharias samhammeri
Carcharias samhammeri Cappetta and Case 1975 sand shark
 Rajiformes - Rhinobatidae
Myledaphus sp.
Myledaphus sp. Cope 1876 guitarfish
 Rajiformes -
Pseudohypolophus mcnultyi
Pseudohypolophus mcnultyi Thurmond 1971 guitarfish