ammonites
Sohl and Koch OFR # 726 (Cretaceous of the United States)

Also known as Martindale; USGS # 15527 : 7621 : 15526

Where: Caldwell County, Texas (29.8° N, 97.8° W: paleocoordinates 35.4° N, 76.8° W)

• outcrop-level geographic resolution

When: Discoscaphites conradi ammonoid zone, Corsicana Marl Formation, Late/Upper Maastrichtian (70.6 - 65.5 Ma)

• Haustator bilira assemblage zone

• formation-level stratigraphic resolution

Environment/lithology: marine; gray, silty claystone

Size class: mesofossils

Preservation: original aragonite, original calcite

Reposited in the USGS

• Stephenson collection

Primary reference: N. F. Sohl and C. F. Koch. 1984. Upper Cretaceous (Maestrichtian) larger invertebrate Fossils from the Haustator bilira Assemblage Zone in the west gulf Coastal Plain. USGS Open File Report 84-687:1-282 [M. Kosnik/M. Kosnik] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 4491: authorized by Matt Kosnik, entered by Matt Kosnik on 14.08.1999