Where: Fillmore, Olmstead County, Minnesota (44.7° N, 92.3° W: paleocoordinates 18.5° S, 62.5° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Glenwood, Platteville, Decorah Formation (Galena Group), Blackriveran to Blackriveran (457.3 - 449.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: limestone and shale

Size class: microfossils

Collection methods: chemical,

Primary reference: W. F. Rice and E. P. Hedblom. 1987. Brachiopods and trilobites of the Sardeson Beds in the Twin Cities. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 131-135 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23298: authorized by Steven Holland, entered by Tori Hanson on 11.07.2002

Creative Commons license: CC BY (attribution)