Where: Minnesota (46.0° N, 94.0° W: paleocoordinates 16.8° S, 62.3° W)
• coordinate estimated from map
• basin-level geographic resolution
When: Elgin Member (Maquoketa Formation), Edenian to Edenian (460.9 - 449.5 Ma)
• member-level stratigraphic resolution
Environment/lithology: shale and limestone
Size class: macrofossils
Collection methods: "[B]ased on a review of the Sardeson Collection at the University of Minnesota, Weiss (1953), Ulrich and Scofield (1895), the unpublished work of Levorson and Gerk, and the list in Stauffer and Thiel (1941)."
Primary reference: R. E. Sloan and G. F. Webers. 1987. Stratigraphic ranges of Middle and Late Ordovician Gastropoda and Monoplacophora of Minnesota. In R. E. Sloan (ed.), Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 183-186 [S. Holland/T. Hanson/S. Bruning]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 23603: authorized by Steven Holland, entered by Tori Hanson on 17.07.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Tergomya | |
| |
Cyrtolites disjunctus Ulrich and Scofield 1897 | |
Gastropoda | |
"Hormotoma trentonensis" = Omospira trentonensis
"Hormotoma trentonensis" = Omospira trentonensis Ulrich and Scofield 1897 snail | |
"Michelia oehlerti" = Hormotoma oehlerti, Hormotoma gracilis
"Michelia oehlerti" = Hormotoma oehlerti Ulrich and Scofield 1897 snail
Hormotoma gracilis Hall 1847 snail | |
| |
Liospira micula Hall and Whitney 1862 snail | |
"Meekospira subconica" = Daidia subconica
"Meekospira subconica" = Daidia subconica Ulrich and Scofield 1897 snail | |
Sinuites cancellatus, "Sinuites concinnus" = Sinuites subcompressa
Sinuites cancellatus Hall 1847 snail
"Sinuites concinnus" = Sinuites subcompressa Ulrich and Scofield 1897 snail | |
Phragmolites dyeri, "Salpingostoma imbricatum" = Salpingostoma imbricata
Phragmolites dyeri Hall 1872 snail
"Salpingostoma imbricatum" = Salpingostoma imbricata Ulrich and Scofield 1897 snail | |
Bivalvia | |
Ambonychiopsis sp. Isberg 1934 clam | |
| |
Orthodesma sp. Hall and Whitfield 1875 clam
Modiolopsis sp. Hall 1847 clam | |
Similodonta sp. Soot-Ryen 1964 clam | |
Nuculites sp. Conrad 1841 clam | |
Palaeoneilo sp. Hall and Whitfield 1869 clam |