Eau Claire Fm. (Cambrian of the United States)

Also known as west-central Indiana

Where: Indiana (39.6° N, 86.9° W: paleocoordinates 25.1° S, 83.5° W)

• coordinate based on political unit

When: Crepicephalus zone, Eau Claire Formation, Dresbachian (497.0 - 485.4 Ma)

• "Dresbachian, Crepicephalus zone"

Environment/lithology: sand shoal; ooidal carbonate

• "oolite. shallow oolite shoal, correlative with Bonneterre Dolo to SW. BA3. craton (stable)"

Size class: mesofossils

Primary reference: A. R. Palmer. 1982. Fossils of Dresbachian and Franconian (Cambrian) age from the subsurface of west-central Indiana. Indiana Department of Natural Resources, Geological Survey Special Report 29:1-12 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 232: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

 Chancelloriida - Chancelloriidae
Chancelloria sp. Walcott 1920
 Hyolithida - Hyolithidae
Hyolithes sp. d'Eichwald 1840
 Pelagiellida - Pelagiellidae
Pelagiella sp. Matthew 1895
 Helcionellida - Helcionellidae
Cycloholcus sp. Knight 1947
  - Llanoaspididae
? Llanoaspis sp. Lochman 1938 trilobite
originally entered as "? Llanoaspis sp."
 Ptychopariida - Tricrepicephalidae
Tricrepicephalus sp. Kobayashi 1935 trilobite
 Ptychopariida - Kingstoniidae
? Blountia sp. Walcott 1916 trilobite
originally entered as "? Blountia sp."
Kingstonia sp. Walcott 1924 trilobite