Where: McCone County County, Montana (47.8° N, 106.2° W: paleocoordinates 54.6° N, 78.5° W)
• coordinate estimated from map
• local area-level geographic resolution
When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)
• 40 feet below the Tullock Formation. The stratigraphic level is said to be 'about the same as Bug Creek Anthills'
• formation-level stratigraphic resolution
Environment/lithology: "floodplain"; lithology not reported
Size class: mesofossils
Primary reference: R. E. Sloan and L. Van Valen. 1965. Cretaceous mammals from Montana. Science 148(3667):220-227 [J. Alroy/J. Alroy/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 13184: authorized by Emmanuel Fara, entered by Emmanuel Fara on 25.01.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Chondrichthyes | |
Ischyrhiza avonicola Estes 1964 ray |