Lock 3, cut on Seaboard Airline RR. 6 miles east-northeast of Ragland (Ordovician of the United States)

Where: St. Clair County, Alabama (33.8° N, 86.1° W: paleocoordinates 29.9° S, 73.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pygodus serra conodont zone, Little Oak Formation, Chazyan (468.1 - 460.9 Ma)

• Chert beds; Climacograptus bicornis

• group of beds-level stratigraphic resolution

Environment/lithology: cherty/siliceous limestone

Size classes: macrofossils, mesofossils

Preservation: replaced with silica

Reposited in the USNM

Primary reference: G. A. Cooper. 1956. Chazyan and related brachiopods. Smithsonian Miscellaneous Collections 127:1-1245 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 186618: authorized by Pete Wagner, entered by Pete Wagner on 28.06.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Leptellinidae
Leptellina tennesseensis Ulrich and Cooper 1936