Guttenberg Formation, Iowa and Wisconsin (Ordovician of the United States)

Where: Iowa/Wisconsin (42.0° N, 90.0° W: paleocoordinates 21.6° S, 63.4° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Guttenberg Formation (Galena Group), Rocklandian (457.3 - 449.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: argillaceous, silty limestone

• Lithology and environment taken from Kolata, D. R. "Lithostratigraphy of the Plateville, Galena and Maquoketa Groups in Northern Illinois." Middle and Late Ordovician Lithostratigraphy and Biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p. 21-24. R. E. Sloan, ed.

Size class: macrofossils

Primary reference: L. L. DeMott. 1987. Platteville and Decorah Trilobites from Illinois and Wisconsin. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 [S. Holland/T. Hanson/S. Holland]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23116: authorized by Steven Holland, entered by Tori Hanson on 09.07.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Raymonidites spiniger
Trilobita
 Corynexochida - Styginidae
Eobronteus lunatus
 Corynexochida - Illaenidae
Thaleops sp., Bumastoides porrectus
Thaleops sp. Conrad 1843 trilobite
 Phacopida - Cheiruridae
Ceraurus plattinensis, Gabriceraurus dentatus
Gabriceraurus dentatus Raymond and Barton 1913 trilobite
 Phacopida - Encrinuridae
"Encrinuroides vigilans" = Erratencrinurus vigilans
"Encrinuroides vigilans" = Erratencrinurus vigilans Hall 1847 trilobite
 Phacopida - Pterygometopidae
Eomonorachus intermedius, Sceptaspis lincolnensis
Eomonorachus intermedius Walcott 1879 trilobite
Sceptaspis lincolnensis Branson 1909 trilobite
 Asaphida - Asaphidae
Isotelus gigas, Isotelus ? violaensis, Isotelus cf. walcotti
Isotelus gigas Dekay 1824 trilobite
Isotelus ? violaensis Amati 2014 trilobite
Isotelus cf. walcotti Walcott 1918 trilobite