Where: Lincoln County, New Mexico (33.5° N, 104.1° W: paleocoordinates 35.5° N, 71.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Prionocyclus macombi ammonoid zone, Tres Hermanos Member (Mancos Shale Formation), Middle Turonian (93.5 - 89.3 Ma)

• Top of Tres Hermanos Sandstone member

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary sandstone

Size class: macrofossils

Collected by S.C. Hook, J.R. Wright, D.E. Tabet, D. Wolberg 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 178826: authorized by Matthew Clapham, entered by Matthew Clapham on 16.05.2016

Creative Commons license: CC BY (attribution)