Where: Minnesota (44.0° N, 92.0° W)

• Paleocoordinates: 9.5° S, 114.7° W (Wright 2013)

• coordinate estimated from map

• basin-level geographic resolution

When: Cummingsville Formation, Shermanian (457.3 - 449.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: limestone and shale

Size class: macrofossils

Primary reference: D. R. Kolata, J. C. Brower, and T. J. Frest. 1987. Upper Mississippi Valley Champlainian and Cincinnatian echinoderms. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 179-181 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23403: authorized by Steven Holland, entered by Tori Hanson on 14.07.2002, edited by Pete Wagner

Creative Commons license: CC0 (CC0)