Where: Las Animas County, Colorado (37.5° N, 104.1° W: paleocoordinates 37.2° N, 67.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Sciponoceras gracile ammonoid zone, Bridge Creek Limestone Member (Greenhorn Formation), Late/Upper Cenomanian (99.6 - 93.5 Ma)

• Basal bed of the Bridge Creek Limestone Member of the Greenhorn Limestone. A very late Cenomanian age is indicated by the presence of the species Calycoceras naviculare and by the genus Pseudocalycoceras.

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by J.B. Reeside, H.R. Christner, W.A. Cobban; G.R. Scott, W.A. Cobban in 1950; 1966; reposited in the USNM

Primary reference: C. W. Cooke. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254-A:1-44 [W. Kiessling/U. Merkel/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 78164: authorized by Wolfgang Kiessling, entered by Uta Merkel on 30.01.2008, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)