Where: Sandoval County, New Mexico (35.7° N, 106.9° W: paleocoordinates 38.2° N, 73.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Prionocyclus hyatti ammonoid zone, Semilla Sandstone Member (Mancos Shale Formation), Middle Turonian (93.5 - 89.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Semilla Sandstone Mbr of the Mancos Shale, which overlies Blue Shale (early Carlile Shale equivalent), and is overlain by another shale (late Carlile Shale equivalent). AGE: Middle Turonian, on the basis of ammonoid biostratigraphy; Prionocyclus hyatti zone. STRATIGRAPHIC POSITION: From unit 2, in lower part of the Semilla Sandstone, 6 ft above base of member.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, calcareous sandstone

Size class: macrofossils

Reposited in the USNM

Collection methods: surface (in situ),

• COLLECTOR: Multiple collectors (1962-1964). REPOSITORY: USNM.

Primary reference: C. H. Dane, E. G. Kauffman, and W. A. Cobban. 1968. Semilla Sandstone, a new member of the Mancos Shale in the southeastern part of the San Juan Basin, New Mexico. United States Geological Survey Professional Paper 1254(F):1-21 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88641: authorized by Austin Hendy, entered by Austin Hendy on 16.04.2009, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)