Where: Socorro County, New Mexico (33.9° N, 106.8° W: paleocoordinates 34.4° N, 70.7° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dunveganoceras pondi ammonoid zone, Mancos Shale Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

• Lower part

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Collected by E.R. Landis, W.A. Cobban in 1967; 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 175721: authorized by Matthew Clapham, entered by Matthew Clapham on 03.01.2016

Creative Commons license: CC BY (attribution)