Where: Minnesota (44.0° N, 92.0° W: paleocoordinates 19.1° S, 62.9° W)
• coordinate estimated from map
• basin-level geographic resolution
When: Dubuque Formation, Edenian (451.0 - 450.2 Ma)
• formation-level stratigraphic resolution
Environment/lithology: argillaceous wackestone
Size class: macrofossils
Primary reference: D. R. Kolata, J. C. Brower, and T. J. Frest. 1987. Upper Mississippi Valley Champlainian and Cincinnatian echinoderms. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 179-181 [S. Holland/T. Hanson/T. Hanson]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 23408: authorized by Steven Holland, entered by Tori Hanson on 14.07.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Glyptocystitid sp. n. gen.
| |
Amecystis sp. Ulrich and Kirk 1921 | |
Cyclocystoidea | |
Actinodiscus sp. Smith and Paul 1982
Cyclocystoides sp. Salter and Billings 1858 |