Highway 93 road cut (Cambrian of the United States)

Where: Wisconsin (44.3° N, 91.5° W: paleocoordinates 20.3° S, 80.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Jordan Sandstone Formation, Trempealeauan (492.5 - 485.4 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, fine, intraclastic sandstone and lithified, medium-grained, coarse sandstone

• lower most Jordan Formation is marked by the dominance of very fine to fine-grained sandstone, amalgamated hummocky CS or with struturless mottled texture, coarsens upward without interruption to trough cross-stratified, med. to coarse ss

Size class: macrofossils

Preservation: mold/impression

Reposited in the AMNH, OU

Primary reference: S. R. Westrop, A. R. Palmer, and A. Runkel. 2005. A new Sunwaptan (Late Cambrian) trilobite fauna from the Upper Mississippi valley. Journal of Paleontology 79(1):72-88 [S. Peters/S. Peters/O. Alfaro]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 54180: authorized by Shanan Peters, entered by Shanan Peters on 26.09.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Dikelocephalidae
Dikelocephalus minnesotensis, Calvinella cf. wisconsinensis
Dikelocephalus minnesotensis Owen 1852 trilobite
 Asaphida - Eurekiidae
Corbinia burkhalteri n. sp., Eurekia cf. eos, Arcadiaspis bispinata n. gen. n. sp.
Corbinia burkhalteri n. sp. trilobite
Eurekia cf. eos trilobite
Arcadiaspis bispinata n. gen. n. sp. trilobite
 Ichnofossils -
Skolithos sp., Planolites sp.
Skolithos sp. Haldemann 1840
Planolites sp. Nicholson 1873