Where: Minnesota (45.0° N, 93.1° W: paleocoordinates 17.9° S, 62.7° W)

• coordinate estimated from map

When: Spechts Ferry Member (Decorah Formation), Rocklandian (457.3 - 449.6 Ma)

• "Black River (Decorah) Shales", in Bassler (1911)

•This shale is supposed to be equivalent to the Sprechts Ferry shale from elsewhere in Minnesota.

• member-level stratigraphic resolution

Environment/lithology: marine; shale

Size classes: macrofossils, mesofossils

Primary reference: R. S. Bassler. 1911. The early Paleozoic Bryozoa of the Baltic Provinces. Bulletin of the United States National Museum 77:1-375 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 167573: authorized by Björn Kröger, entered by Björn Kröger on 24.03.2015, edited by Pete Wagner

Creative Commons license: CC BY (attribution)