Also known as Calcareous, argillaceous sandstone in public road, 0.6 to 0.8 mile north-east of Chatfield, Navarro County; from upper part of formation., 14117: "Concretions in ditches and in field near road, 0.6 and 0.8 mile northeast of Chatfield, Navarro County. (See 7572)"

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

• 7572: L. W. Stephenson 1911, 14117: L. W. Stephenson 1928

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 7503: authorized by Matt Kosnik, entered by Matt Kosnik on 18.07.2000, edited by Uta Merkel and Pete Wagner

Creative Commons license: CC BY (attribution)