Where: Nuevo Leon, Mexico (26.3° N, 99.5° W: paleocoordinates 31.7° N, 81.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Midway Formation, Danian (66.0 - 61.6 Ma)

• The Midway Formation of northeastern Mexico is divided into upper and lower divisions (members). The lower member roughly correlates to the Kincaid and Clayton Formations of the Gulf Coastal Plain. Collection is from a limestone with faunal similarities to the Kincaid Formation.

• bed-level stratigraphic resolution

Environment/lithology: lithified, shelly/skeletal, brown, gray, sandy limestone

Size class: macrofossils

Preservation: original aragonite, original calcite, replaced with calcite

Reposited in the USNM

Collection methods: quarrying,

• Collections reposited in USGS and USNM collections.

Primary reference: J. Gardner. 1945. Mollusca of the Tertiary formations of Northeastern Mexico. Geological Society of American Memoir 11 [M. Kosnik/M. Kosnik/M. Kosnik]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42895: authorized by Austin Hendy, entered by Austin Hendy on 06.08.2004

Creative Commons license: CC BY (attribution)