Where: Nuevo Leon, Mexico (26.3° N, 99.5° W: paleocoordinates 30.8° N, 83.8° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Lower Member (Midway Formation), Thanetian (59.2 - 56.0 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 form 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)