Chatfield, Decorah Shale (Ordovician of the United States)
Where: Fillmore County, Minnesota (43.8° N, 92.2° W: paleocoordinates 19.2° S, 63.1° W)
• coordinate estimated from map
When: Decorah Shale Formation, Blackriveran (457.3 - 449.6 Ma)
• "Black River (Decorah) Shales", in Bassler (1911)
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 167628: authorized by Björn Kröger, entered by Björn Kröger on 26.03.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
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