Where: Niobrara County County, Wyoming (43.2° N, 104.3° W: paleocoordinates 49.4° N, 72.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Baculites obtusus-Baculites maclearni ammonoid zone, Sharon Springs Member (Pierre Shale Formation), Middle Campanian (83.5 - 70.6 Ma)

• The Sharon Springs Member spans the Baculites obtusus-Baculites maclearni in Wymoning (Gill et al. 1972)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Reposited in the UCM

Primary reference: K. Carpenter. 1996. A review of short-necked plesiosaurs of the Western Interior, North America. Neues Jahrbuch fur Geologie und Palaontologie, Abhandlungen 201(2):259-287 [M. Carrano/H. Street]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117860: authorized by Roger Benson, entered by Roger Benson on 28.09.2011

Creative Commons license: CC BY (attribution)