Where: Adams County, Ohio (38.8° N, 83.5° W: paleocoordinates 26.9° S, 52.9° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Cycle I zone, Brassfield Formation, Llandovery (443.7 - 428.2 Ma)

• "early Sil. upper Llandovery. cycle I. Brassfield Fm.- upper thinnly bedded unit"

Environment/lithology: offshore; carbonate and shale

Primary reference: J. J. Sepkoski Jr. 1998. Rates of speciation in the fossil record. Philosophical Transaction of the Royal Society Biological Sciences 353(1366):315-326 [J. Sepkoski/M. Sommers/A. Clement] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 448: authorized by Jack Sepkoski, entered by Mike Sommers on 08.12.1998, edited by Pete Wagner