Where: Columbiana County, Ohio (40.6° N, 80.6° W: paleocoordinates 7.0° S, 17.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Dark Shale Member (Mahoning Formation), Podolskian to Podolskian (311.4 - 300.2 Ma)

• Section (Figure 1) on p. 48.

• group of beds-level stratigraphic resolution

Environment/lithology: mire or swamp; pyritic, black, gray, argillaceous, carbonaceous shale

Size class: macrofossils

Preservation: adpression, permineralized, replaced with pyrite

Primary reference: M. A. McComas. 1988. Upper Pennsylvanian compression floras of the 7-11 Mine, Columbiana County, northeastern Ohio. Ohio Journal of Science 88:48-52 [H. Sims/S. Ostrowski]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 11188: authorized by Hallie Sims, entered by Summer Ostrowski on 23.07.2001, edited by Alistair McGowan and Jason Cassara

Creative Commons license: CC BY (attribution)