Where: Wisconsin, Illinois, Iowa (42.5° N, 92.5° W: paleocoordinates 20.0° S, 65.2° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Galena Dolomite Formation, Middle Ordovician to Middle Ordovician (470.0 - 443.8 Ma)

• Formation named by Bassler (1915); local age/stage and correlation with other formations uncertain.

• formation-level stratigraphic resolution

Environment/lithology:

Size class: macrofossils

Collection methods: "Where possible, stratigraphic information is taken from museum labels; where this is not possible, it is taken from Bassler (1915)."

Primary reference: J., J.r. Pojeta. 1987. Ordovician pelecypods from the Upper Mississippi Valley. In R. E. Sloan (ed.), Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 182-182 [S. Holland/T. Hanson/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23553: authorized by Steven Holland, entered by Tori Hanson on 16.07.2002

Creative Commons license: CC BY (attribution)