northwest of Forsyth, west of Venanda (Cretaceous of the United States)

Where: Treasure County, Montana (46.4° N, 107.2° W: paleocoordinates 53.0° N, 73.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bearpaw Shale Formation (Montana Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

Size class: macrofossils

Collection methods: surface (float), surface (in situ),

Primary reference: D. G. Darby and R. W. Ojakangas. 1980. Gastroliths from an Upper Cretaceous plesiosaur. Journal of Paleontology 54(3):548-556 [M. Carrano/H. Street]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 102069: authorized by Matthew Carrano, entered by Hallie Street on 07.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Sauropterygia - Elasmosauridae
? Alzadasaurus sp. Welles 1943 elasmosaur