Where: Las Animas County, Colorado (37.4° N, 104.1° W: paleocoordinates 37.2° N, 67.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• Basal bed of Bridge Creek Limestone member.

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by N.W. Bass; G.R. Scott, W.A. Cobban in 1941; 1966; reposited in the USNM

Primary reference: W. A. Cobban. 1972. New and little-known ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the western interior of the United States. United States Geological Survey Professional Paper 699:1-24 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176980: authorized by Matthew Clapham, entered by Matthew Clapham on 10.03.2016

Creative Commons license: CC BY (attribution)