Where: Cibola County, New Mexico (34.7° N, 107.9° W: paleocoordinates 37.5° 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)

• COMMENTS: basal 3 m of D-Cross Tongue of Mancos Shale. AGE: Middle Turonian, on the basis of ammonite biostratigraphy; Prionocyclus wyomingensis collignoniceratid zone (Kennedy et al., 2001).

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by C.H. Dane, G. O. Bachman, W.A. Cobban in 1959; 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 77804: authorized by Wolfgang Kiessling, entered by Uta Merkel on 21.01.2008

Creative Commons license: CC BY (attribution)