south side, Butte Creek (Cretaceous of the United States)

Also known as Russell Springs

Where: Logan County, Kansas (38.8° N, 101.0° W: paleocoordinates 42.2° N, 67.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Santonian (86.3 - 83.6 Ma)

• upper part of member

• bed-level stratigraphic resolution

Environment/lithology: coastal; chalk

Size class: macrofossils

Collected by C. H. Sternberg in 1917; reposited in the USNM

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

Primary reference: D. A. Russell. 1967. Systematics and morphology of American mosasaurs (Reptilia, Sauria). Bulletin of the Peabody Museum of Natural History 23:1-252 [M. Carrano/H. Street/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191649: authorized by Matthew Carrano, entered by Matthew Carrano on 06.02.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Mosasauridae
Tylosaurus proriger Cope 1869 mosasaur
USNM 8898, partial skeleton