USGS 3180, Myrick's Apiary, Frio River (Paleocene of the United States)

Also known as M 413

Where: Uvalde County, Texas (29.2° N, 99.6° W)

• Paleocoordinates: 38.0° N, 70.4° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Kincaid Formation (Midway Group), Danian (66.0 - 61.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shoreface; glauconitic, conglomeratic sandstone

• According to Roy (1984): "The siltstone at the head of the Rio Grande Embayment is interpreted to have been deposited in a shoreface environment. Grain size increases upward in the section with a concurrent decrease in clay content. Numerous scour channels indicate deposition at or near wavebase in a nearshore environment. Paleontological evidence, particularly the change in burrows, suggests an environmental change that would occur from the transition from offshore to nearshore." The basal conglomeratic sandstone is consistent with a shoreface at the beginning of transgression.

Size class: mesofossils

Collected by T.W. Vaughan; reposited in the USNM

Primary reference: J. Gardner. 1933. The Midway Group of Texas. The University of Texas Bulletin, Publication Bureau of Economic Geology (3301) [J. Sessa/L. Eccles]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92245: authorized by Jocelyn Sessa, entered by Laurie Eccles on 04.11.2009, edited by Ursula Smith

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Nautilida - Hercoglossidae
Cimomia vaughani
Cimomia vaughani Gardner 1923
Gastropoda
 Sorbeoconcha - Eocypraeidae
Eocypraea estellensis
Eocypraea estellensis Aldrich 1921 snail
 Cerithioidea - Cerithiidae
? Cerithium "sp. A"
? Cerithium "sp. A" Bruguière 1789 cerith snail
 Cerithioidea - Turritellidae
Turritella "sp. D"
Turritella "sp. D" Lamarck 1799 turret shell
Bivalvia
 Cardiida - Veneridae
Pitar pteleinus
Pitar pteleinus venus clam
 Carditida - Carditidae
"Venericardia hesperia" = Venericardia (Baluchicardia) hesperia, Venericardia whitei, Venericardia (Venericor) smithii, ? Glyptoactis crenaea
"Venericardia hesperia" = Venericardia (Baluchicardia) hesperia Gardner 1923 clam
Venericardia whitei Gardner 1823 clam
 Arcida - Cucullaeidae
Cucullaea texana