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

• Second limestone from base

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

Size class: macrofossils

Preservation: concretion

Reposited in the USNM

Primary reference: W. J. Kennedy and W. A. Cobban. 1990. Cenomanian micromorphic ammonites from the western interior of the USA. Palaeontology 33:379-422 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 175429: authorized by Matthew Clapham, entered by Matthew Clapham on 11.12.2015

Creative Commons license: CC BY (attribution)