Where: Valencia County, New Mexico (35.1° N, 107.4° W: paleocoordinates 35.7° N, 71.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• From brown-weathering sandstone concretions just below the second sandstone member of the Mancos Shale

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Collected by E.R. Landis, C.H. Maxwell, W.A. Cobban in 1969; 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 176967: authorized by Matthew Clapham, entered by Matthew Clapham on 10.03.2016

Creative Commons license: CC BY (attribution)