Where: Mexico (25.7° N, 100.5° W: paleocoordinates 22.7° N, 53.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Valanginian (139.8 - 132.9 Ma)

• STRATIGRAPHIC RELATIONS: From unnamed unit, immediately above Berriasian limestone, and overlain by Hauterivian-Barremian limestones. THICKNESS: From beds within a 150 m thickness of strata. AGE: Valanginian based on ammonite biostratigraphy. STRATIGRAPHIC POSITION: Unknown position within lithostratigraphic unit

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, pyritic, sideritic, yellow limestone

Size class: macrofossils

Preservation: replaced with pyrite

Collection methods: quarrying,

• COLLECTOR: Presumably Böse and Cavins. REPOSITORY: Bureau of Economic Geology, University of Texas, Austin.

Primary reference: E. Böse and O.A. Cavins. 1927. The Cretaceous and Tertiary of southern Texas and northern Mexico. University of Texas Bulletin 2748:1-142 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 65622: authorized by Austin Hendy, entered by Austin Hendy on 23.09.2006

Creative Commons license: CC BY (attribution)