Where: Coahuila, Mexico (29.2° N, 102.5° W: paleocoordinates 32.1° N, 71.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Early/Lower Coniacian (89.3 - 85.8 Ma)

• A single bed corresponding to beds R40–42 of El Rosario. Other layers occasionally exposed are correlated to layers R38–46, i.e., to the middle Yellow Limestone Member at Rosario by their similar lithology, thickness and fossil content. The abundant presence of the inoceramid Cremnoceramus deformis erectus (Meek, 1877) permits assignment of an early Coniacian age (Walaszczyk and Wood, 1998; Gradstein et al., 2004) to all layers exposed at Carranza.

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collection methods: Repository: CPC: Colección de Paleontología de Coahuila, Museo del Desierto, Saltillo, Coahuila

Primary reference: W. Stinnesbeck, C. Ifrim, H. Schmidt, A. Rindfleisch, M.-C. Buchy, E. Frey, A. H. González-González, F. J. Vega, L. Cavin, G. Keller, and K. T. Smith. 2005. A new lithographic limestone deposit in the Upper Cretaceous Austin Group at El Rosario, county of Múzquiz, Coahuila, northeastern Mexico. Revista Mexicana de Ciencias Geológicas 22:401-418 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 210315: authorized by Matthew Clapham, entered by Matthew Clapham on 30.05.2020

Creative Commons license: CC BY (attribution)