Where: Oklahoma (34.3° N, 97.1° W: paleocoordinates 21.9° S, 66.7° W)

• coordinate based on political unit

When: Cochrane Formation, Alexandrian (443.4 - 436.0 Ma)

• Above the glauconite beds. Note: Given as the Chimney Hill formation, but that is confined to Kansas (far north of these localities) and Macrostrat gives the Chimney Hill (= Chimneyhill) an age immediately younger than Alexandrian (which is poorly defined, anyway.) So, this should be Cochrane.

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Reposited in the USNM

Primary reference: H. A. Ireland. 1961. New Phosphatic Brachiopods from the Silurian of Oklahoma. Journal of Paleontology 35(6):1137-1142 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 232727: authorized by Pete Wagner, entered by Pete Wagner on 26.12.2023

Creative Commons license: CC BY (attribution)