Cannon Falls, Lower Trenton Shales (Ordovician of the United States)

Where: Minnesota (44.5° N, 92.9° W: paleocoordinates 18.3° S, 63.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Trentonian (460.9 - 449.5 Ma)

• "Lower Trenton 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 167564: authorized by Björn Kröger, entered by Björn Kröger on 24.03.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Stenolaemata
 Trepostomata - Trematoporidae
Eridotrypa aedilis Eichwald 1855