Where: Gregory County, South Dakota (43.0° N, 98.6° W: paleocoordinates 47.6° N, 65.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Sharon Springs Member (Pierre Shale Formation), Campanian (83.6 - 72.1 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

Size class: macrofossils

Reposited in the YPM

Primary reference: D. A. Russell. 1964. The Skull of American Mosasaurs. 1-386 [M. Carrano/H. Street/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 107642: authorized by Matthew Carrano, entered by Hallie Street on 12.04.2011

Creative Commons license: CC BY (attribution)