Where: Knox County, Illinois (40.0° N, 90.0° W: paleocoordinates 5.8° S, 25.6° W)

• coordinate based on nearby landmark

When: Purington Shale Formation, Pennsylvanian (323.2 - 298.9 Ma)

Environment/lithology: fluvial-deltaic; shale

Size class: macrofossils

Primary reference: H. W. Pfefferkorn. 1979. High diversity and stratigraphic age of the Mazon Creek flora (In M. Nitcki (ed.)). Mazon Creek Fossils. University of Chicago Press, Chicago, IL USA 129-142 [H. Sims/S. Ostrowski]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 11190: authorized by Hallie Sims, entered by Summer Ostrowski on 23.07.2001, edited by Heather Lindon

Creative Commons license: CC BY (attribution)