Crockett L3: San Antonio-Nacogdoches, Robertson County, TX (Eocene of the United States)

Where: Robertson County, Texas (31.0° N, 96.5° W: paleocoordinates 32.3° N, 87.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Crockett Formation (Claiborne Group), Bartonian (41.3 - 38.0 Ma)

• Original Description: Middle Eocene: Claiborne Group: Cook Mountain Formation: Crockett Member. (Revised stratigraphy elevates the Crockett member to a formation in the Bartonian).

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•This locality is about 25 ft. stratigraphically higher than the previous locality at Campbell's Creek.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; concretionary, gypsiferous, yellow shale

• The small black concretions found here in light-buff to yellow gypsiferous shale are very similar to those of the Little Brazos River and are at the same stratigraphic level.

Size class: macrofossils

Preservation: concretion

Collection methods: Other fossils were collected in the Crockett, but only crustaceans are presented here.

Primary reference: H. B. Stenzel. 1934. Decapod Crustaceans from the Middle Eocene of Texas. Journal of Paleontology 8(1):38-56 [L. Ivany/C. Visaggi/C. Visaggi]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 43112: authorized by Linda Ivany, entered by Christy Visaggi on 10.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Malacostraca
 Decapoda - Zanthopsidae
Harpactocarcinus americanus
Harpactocarcinus americanus Rathbun 1928 crab