Where: Fallon County, Montana (46.3° N, 104.5° W: paleocoordinates 52.8° N, 77.4° W)

• coordinate based on political unit

When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)

• 7.5 m below the contact with the overlying Fort Union Formation

Environment/lithology: "channel"; sandstone

Size class: macrofossils

Primary reference: W. G. Joyce and T. R. Lyson. 2017. The shell morphology of the latest Cretaceous (Maastrichtian) trionychid turtle Helopanoplia distincta. PeerJ 5(e4169):1-20 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190696: authorized by Patricia Holroyd, entered by Patricia Holroyd on 14.12.2017

Creative Commons license: CC BY (attribution)