AW-1-4, Criner Hills (Ordovician of the United States)

Where: Carter County, Oklahoma (34.1° N, 97.2° W: paleocoordinates 22.0° S, 78.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: McLish Formation (Simpson Group), Whiterockian (471.8 - 457.5 Ma)

• 305 feet above base of formation.

Environment/lithology: shallow subtidal; quartzose sandstone and grainstone

• "alternating quartz sands, calcarenites, and shales, many of which are greenish-brown in color"

Size class: macrofossils

Collected by F. C. Shaw in the 1970s; reposited in the OU

Primary reference: F. C. Shaw. 1974. Simpson Group (Middle Ordovician) trilobites of Oklahoma. Paleontological Society Memoir 6:1-54 [M. Hopkins/M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 105615: authorized by Melanie Hopkins, entered by Melanie Hopkins on 23.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• Abundance categories: f = 1-5 specimens; c = 6-10 specimens; a = more than 10 specimens.
 Asaphida - Asaphidae
Isotelus sp. Dekay 1824 trilobite
 Asaphida - Remopleurididae
Eorobergia cf. marginalis Raymond 1925 trilobite