near Fish Creek (Cretaceous of the United States)

Where: Sweet Grass County, Montana (46.2° N, 109.7° W: paleocoordinates 53.3° N, 76.0° W)

• coordinate based on nearby landmark

When: Pierre Shale Formation (Montana Group), Campanian (83.6 - 72.1 Ma)

• Referred to as Bearpaw by Russsell.

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, brown, gray shale

• "The beds are composed of dark-colored shales, with occasional very thin lenses or layers of sand. Sometimes the shales have no grit, sometimes they contain much fine sand. There are many brown or grayish, rounded concretions or concretionary layers. These concretions are often very hard." Douglass, 1902, Science.

•"Dark, soft shales predominate. There are occasional thin bands of

•sand and many brownish concretions which break into angular

•fragments. These sometimes contain marine fossils and sometimes

•a network of calcite seams." Douglass, 1902, Proc. Amer. Phil. Soc.

Size class: macrofossils

Collected in 1900

Primary reference: E. Douglass. 1902. Dinosaurs in the Fort Pierre Shales and underlying beds in Montana. Science 15(366):31-32 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 107426: authorized by Matthew Carrano, entered by Hallie Street on 08.04.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Squamata - Mosasauridae
Mosasauridae indet.
Mosasauridae indet. Gervais 1852 mosasaur
 Ornithischia -
Claosaurus sp.
Claosaurus sp. Marsh 1890 ornithopod