Crosby Site (Cretaceous of the United States)

Where: Park County, Wyoming (45.0° N, 108.9° W: paleocoordinates 51.9° N, 75.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Campanian (83.6 - 72.1 Ma)

• "uppermost Judith River Formation equivalent... fossiliferous stratum is a coarse dark-colored sandstone... Judith River lithology"; said to be Judithian

• group of beds-level stratigraphic resolution

Environment/lithology: deltaic; sandstone

• "marginal marine deltaic"
• "coarse dark-colored sandstone"

Size classes: macrofossils, mesofossils

Primary reference: J. A. Pappas, B. R. O'Grady, and D. C. Parris. 2003. A Judithian microfaunal locality in Elk Basin, Park County, Wyoming. Journal of Vertebrate Paleontology 23(3, suppl.):85A [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 35367: authorized by John Alroy, entered by John Alroy on 07.12.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Myliobatiformes - Dasyatidae
Myledaphus sp. Cope 1876 whiptail stingray
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar
Reptilia indet. Laurenti 1768 reptile
 Testudines -
"Chelonia indet." = Testudines
"Chelonia indet." = Testudines Batsch 1788 turtle
 Theropoda -
 Neornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Neornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
 Loricata -
Crocodylia indet. crocodilian
Mammalia indet. Linnaeus 1758 mammal