Where: Colfax County, New Mexico (36.4° N, 104.3° W: paleocoordinates 38.3° N, 70.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Prionocyclus hyatti ammonoid zone, Carlile Shale Formation (Colorado Group), Middle Turonian (93.5 - 89.3 Ma)

• From limestone concretions below Juana Lopez member

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary shale

Size class: macrofossils

Collected by S.C. Hook, J.R. Wright in 1979; 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 178818: authorized by Matthew Clapham, entered by Matthew Clapham on 16.05.2016

Creative Commons license: CC BY (attribution)