Where: Teton County, Montana (47.8° N, 112.2° W: paleocoordinates 55.3° N, 77.8° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Two Medicine Formation (Montana Group), Campanian (83.6 - 72.1 Ma)
• horizon is approx. 300 m below the top of the Two Medicine Formation where it underlies the Horsetheif Sandstone, and is therefore considered equivalent to the lower Judith River Formation (lower Upper Campanian, about 77-78 mybp)
• bed-level stratigraphic resolution
Environment/lithology: lacustrine - large; stromatolitic, shelly/skeletal, argillaceous, sandy limestone
Size class: macrofossils
Preservation: mold/impression, permineralized, replaced with other
Collection methods: quarrying, mechanical,
Primary reference: K. Padian. 1984. A large pterodactyloid pterosaur from the Two Medicine Formation (Campanian) of Montana. Journal of Vertebrate Paleontology 4(4):516-524 [J. Alroy/E. Leckey/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 36934: authorized by John Alroy, entered by Erin Leckey on 19.02.2004, edited by Richard Butler
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Reptilia | |
Azhdarchidae indet. Nessov 1984 pterosaur PU 22446, left scapula, distal left humerus, distal left radius, carpal and bone fragments
| |
Bivalvia | |
Unio sp. Philipsson 1788 freshwater mussel |