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
•"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
Reptilia | |
Mosasauridae indet. Gervais 1852 mosasaur | |
Claosaurus sp. Marsh 1890 ornithopod |