Also known as USGS 14039

Where: Tamaulipas, Mexico (26.1° N, 98.3° W: paleocoordinates 26.6° N, 95.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Oakville Sandstone Formation, Middle Miocene (16.0 - 11.6 Ma)

• A resistant scarp-making scanstone. Does not include a fauna sufficient diagnostic to establish the relative ages of the unit to the higher beds of the Guajalote Formation. Typically a very hard, calcareous sandstone. Has some faunal similarity with the Thomonde formation (lower Miocene) of Haiti. This would suggest an age as older if not older than the Guajalote Fm. The author appears to correlate this unit to the Oakville Sandstone of Texas and gives it a middle Miocene age however.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, calcareous sandstone

Size class: macrofossils

Preservation: mold/impression

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 43095: authorized by Austin Hendy, entered by Austin Hendy on 10.08.2004

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)