Where: Wheatland County, Montana (46.5° N, 109.5° W: paleocoordinates 53.6° N, 76.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Claggett Formation, Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine

Size class: macrofossils

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

Primary reference: A. R. Fiorillo. 1990. The first occurrence of hadrosaur (Dinosauria) remains from the marine Claggett Formation, Late Cretaceous of south-central Montana. Journal of Vertebrate Paleontology 10(4):515-517 [M. Carrano/K. Maguire/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 53146: authorized by Matt Carrano, entered by Kaitlin Maguire on 06.09.2005, edited by Matt Carrano