Elm Lake Spillway (Cretaceous of the United States)

Where: Brown County, South Dakota (45.9° N, 98.7° W: paleocoordinates 50.3° N, 64.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Virgin Creek Member (Pierre Shale Formation), Campanian (83.6 - 72.1 Ma)

• "probably from Virgin Creek member"

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

Size class: macrofossils

Collected by J. Bump, H. Martin in 1945; reposited in the SDSM

• Most of the skull and jaw material had been dis-articulated and washed downstream by the time of discovery of the skeleton, but "some of the pieces were recovered from neighbors and other visitors who had taken home a souvenir of the beast."

Primary reference: H. Martin. 1953. Mosasaurus poultneyi a South Dakota mosasaur 1-65 [M. Carrano/H. Street]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 107779: authorized by Matthew Carrano, entered by Hallie Street on 15.04.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ammonitida - Baculitidae
Baculites compressus Say 1920 ammonite
 Squamata - Mosasauridae
Mosasaurus missouriensis Harlan 1834 mosasaur
SDSM 452, partial skeleton; called Mosasaurus poultneyi by Martin