Where: Petroleum County, Montana (47.3° N, 108.2° W: paleocoordinates 54.1° N, 74.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Coal Ridge Member (Judith River Formation), Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collection methods: surface (in situ),

Primary reference: P. Penkalski and P. Dodson. 1999. The morphology and systematics of Avaceratops, a primitive horned dinosaur from the Judith River Formation (Late Campanian) of Montana, with the description of a second skull. Journal of Vertebrate Paleontology 19(4):692-711 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 206062: authorized by Matthew Carrano, entered by Matthew Carrano on 29.10.2019

Creative Commons license: CC BY (attribution)