Also known as Hydralmosaurus serpentinus type locality
Where: Nebraska (42.7° N, 96.8° W: paleocoordinates 47.1° N, 64.9° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Sharon Springs Member (Pierre Shale Formation), Early/Lower Campanian to Early/Lower Campanian (83.5 - 70.6 Ma)
• Storrs (1999, p. 5) suggests Sharon Springs Shale Member, Pierre Shale (Campanian), accompanied by a discussion of Welles (1962) provenance of 'Cretaceous No. 3 (i.e. Niobrara Chalk, or Pierre Shale). and description of the matrix: "blue shale with selenite venation,quite unlike Niobrara rocks but identical to matrix associated with known Pierre specimens"
•Carpenter (1999, p. 156) stated "Smoky Hill Chalk member, Niobrara Formation (Santonian?)" without justification.
•The Sharon Springs member in Nebraska has an ammonite zone range of Baculites sp. (smooth)–Baculites mclearni (Early-Middle Campanian) according to Gill et al. (1972).
• bed-level stratigraphic resolution
Environment/lithology: marine; blue shale
Size class: macrofossils
Collected by E. D. Cope in 1876; reposited in the AMNH
Collection methods: surface (in situ)
Primary reference: E. D. Cope. 1877. Report on the geology of the region of the Judith River, Montana, and on vertebrate fossils obtained on or near the Missouri River. Bulletin of the United States Geological and Geographical Survey 3(3):565-597 [M. Carrano/M. Carrano/E. Vlachos]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 116621: authorized by Roger Benson, entered by Roger Benson on 10.09.2011, edited by Philip Mannion
Creative Commons license: CC BY (attribution)