Where: Tarrant County, Texas (32.7° N, 97.4° W: paleocoordinates 31.2° N, 62.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Eagle Ford Formation, Cenomanian (100.5 - 93.9 Ma)

• From the basal 10 ft

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, calcareous sandstone and shale

Size class: macrofossils

Reposited in the USGS

Collection methods: mechanical,

• "[collector] found the internal mold of a fragment of large ammonite...loose at the base of the...section, and probably weathered out of either layer 4 or layer 5 [layer 4, as geol comment., layer 5: clay, dark, shaly, gypsiferous; a few concretionary calc. ss masses ~4 ft above base]"

Primary reference: L. W. Stephenson. 1955. Basal Eagle Ford fauna (Cenomanian) in Johnson and Tarrant Counties, Texas. United States Geological Survey Professional Paper 274-C:53-67 [J. Alroy/M. Sommers/A. Clement]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 2123: authorized by John Alroy, entered by Mike Sommers on 22.06.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)