Where: Socorro County, New Mexico (34.5° N, 107.7° W: paleocoordinates 37.2° N, 74.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Prionocyclus wyomingensis ammonoid zone, D-Cross Member (Mancos Shale Formation), Middle Turonian (93.5 - 89.3 Ma)

• Basal 2 m of D-Cross Tongue

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by G.L. Massingill in 1977; reposited in the USNM

Primary reference: W. A. Cobban and S. C. Hook. 1980. The Upper Cretaceous (Turonian) ammonite family Coilopoceratidae Hyatt in the Western Interior of the United States. United States Geological Survey Professional Paper 1192:1-28 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 178824: authorized by Matthew Clapham, entered by Matthew Clapham on 16.05.2016

Creative Commons license: CC BY (attribution)