USGS 16163 (Cretaceous of the United States)

Also known as Road ditch 3.3 miles west-southwest of the courthouse at Corsicana, 0.8 mile south by west of Whites Chapel, 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; gray, sandy, calcareous claystone

• large roundish light gray fossiliferous calcareous, sandy concretions in sandy clay, lower part of formation.

Size class: mesofossils

Reposited in the USGS

• L. W. Stephenson 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 7565: authorized by Matt Kosnik, entered by Matt Kosnik on 18.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Myalinida - Inoceramidae
Inoceramus sp.
Inoceramus sp. Sowerby 1814 clam
Inoceramus sp. e Stephenson 1941
 Cardiida - Arcticidae
Veniella lineata
Veniella lineata clam
Veniella lineata (Shumard)
Cephalopoda
 Ammonitida - Nostoceratidae
Helicoceras navarroense
Helicoceras navarroense ammonite
Helicoceras navarroense Shumard
 Ammonitida - Baculitidae
Baculites claviformis
Baculites claviformis Stephenson 1941 ammonite
Baculites claviformis Stephenson
 Ammonitida - Diplomoceratidae
Solenoceras texanum
Solenoceras texanum Shumard 1861 ammonite
Solenoceras texanum (Shumard)
Gastropoda
 Neogastropoda - Paladmetidae
Paladmete inequalis
Paladmete inequalis snail
Paladmete inequalis Stephenson