Also known as Borrow pit east of U.S. Highway 75 at foot of northward-facing slope of Chambers Creek valley, 0.5 mile northwest of Oil Ridge School, 4 miles north of the courthouse at Corsicana, Navarro County;

Where: Navarro County, Texas (32.1° N, 96.5° W: paleocoordinates 36.9° N, 68.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Nostoceras hyatti ammonoid zone, Nacatoch Sand Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• Stephenson (1941) had this unit as Maastrichtian, Cobban and Kennedy (1995) have updated it to uppermost Campanian via ammonite zonation.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; concretionary, argillaceous, calcareous sandstone

Size class: mesofossils

Reposited in the USGS

• USGS 17366: L. W. Stephenson 1936TxBureau 17304: Gene Ross 1932

Primary reference: L. W. Stephenson. 1941. The larger invertebrate fossils of the Navarro group of Texas. The University of Texas Publication 4101:1-625 [M. Kosnik/M. Kosnik]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 7579: authorized by Matt Kosnik, entered by Matt Kosnik on 18.07.2000

Creative Commons license: CC BY (attribution)