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 | |
? Alzadasaurus sp. Welles 1943 elasmosaur |