Where: Minnesota (44.0° N, 92.0° W: paleocoordinates 19.1° S, 62.9° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Elgin Member (Maquoketa Formation), Edenian to Edenian (451.0 - 449.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: shale and limestone

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 23409: authorized by Steven Holland, entered by Tori Hanson on 14.07.2002

Creative Commons license: CC BY (attribution)