Where: Pueblo County, Colorado (38.3° N, 104.7° W)

• Paleocoordinates: 44.7° N, 62.3° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Acanthoceras muldoonense ammonoid zone, Graneros Formation, Middle Cenomanian (99.6 - 93.5 Ma)

• 9.4 m (31 ft) below top

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, ferruginous shale

Size class: macrofossils

Collected by W.A. Cobban in 1957; reposited in the USNM

Primary reference: W. A. Cobban. 1987. The Upper Cretaceous (Cenomanian) ammonites Metengonoceras dumbli (Cragin) and M. acutum Hyatt. United States Geological Survey Bulletin 1690:C1-C7 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 175720: authorized by Matthew Clapham, entered by Matthew Clapham on 03.01.2016

Creative Commons license: CC0 (CC0)