Also known as USGS 13486
Where: Nuevo Leon, Mexico (25.7° N, 99.2° W: paleocoordinates 30.1° N, 84.0° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Upper Member (Midway Formation), Late/Upper Paleocene (58.7 - 55.8 Ma)
• The Midway Formation of northeastern Mexico is divided into upper and lower divisions (members). The lower member roughly correlates to the Wills Point, Naheola, and Porters Creek Formations of the Gulf Coastal Plain. Collections show little faunal similarity to any Gulf Coast units.
• bed-level stratigraphic resolution
Environment/lithology: coastal; lithified, shelly/skeletal, gray, argillaceous, calcareous sandstone
Size class: macrofossils
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 42925: authorized by Austin Hendy, entered by Austin Hendy on 07.08.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Mesalia sayi turret shell | |
Bivalvia | |
Ostrea ? eothirsae oyster |