409 ft. above base (Cambrian of the United States)

Where: McCulloch County, Texas (31.0° N, 99.3° W: paleocoordinates 17.5° S, 95.2° W)

When: Saukia trilobite zone, San Saba Member (Wilberns Formation), Trempealeauan (492.5 - 485.4 Ma)

• bed number is feet above base. Highly variable, has calcitic facies (North) and Dolomitic facies (South)

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, medium-grained, coarse, dolomitic, glauconitic, ooidal, shelly/skeletal, silty, sandy limestone

• Interval 391-413ft: Limestone— mostly coarse grained, some medium grained, a little fine grained; mostly yellowishgray to darker,mottled by pale yellowish-orange and grayish-orange dolomite which appears to be replacing fossil fragment sand other objects; glauconite and ooids common; slightly argillaceous; very slightly silty, silt both quartz and feldspar; some very fine sand in bottom sample; mudballs(?) in some beds.

Size class: macrofossils

Primary reference: V. E. Barnes and W. C. Bell. 1977. The Moore Hollow Group of Central Texas. Report of Investigation (88)1-169 [M. Patzkowsky/K. Irizarry/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 216015: authorized by Mark Patzkowsky, entered by Kayla Irizarry on 02.12.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Ptychaspididae
Euptychaspis kirki, Keithiella patula
Euptychaspis kirki trilobite
Kobayashi
Keithiella patula trilobite
Winston & Nicholls 1967
 Asaphida - Dikelocephalidae
Briscoia llanoensis
Briscoia llanoensis Winston and Nicholls 1967 trilobite
Winston & Nicholls 1967
 Asaphida - Eurekiidae
Eurekia eos
Eurekia eos trilobite