Eau Claire Formation
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American geologic formation
TypeFormation
Unit ofMunising Group
UnderliesDavis Formation, Galesville Sandstone, Kerbel Formation, Knox Dolomite, and Potosi Dolomite
OverliesMount Simon Sandstone
| Eau Claire Formation | |
|---|---|
| Stratigraphic range: Cambrian | |
_1.jpg) Eau Claire Formation (Middle to Upper Cambrian; Warren County core, Ohio) | |
| Type | Formation |
| Unit of | Munising Group |
| Underlies | Davis Formation, Galesville Sandstone, Kerbel Formation, Knox Dolomite, and Potosi Dolomite |
| Overlies | Mount Simon Sandstone |
| Thickness | 400 to 1000 feet in Indiana[1] |
| Lithology | |
| Primary | Sandstone |
| Other | Siltstone, shale, dolomite |
| Location | |
| Region | Indiana, Illinois, Wisconsin, Michigan, Minnesota, western Ohio, and western Kentucky. Equivalent to the Bonneterre Formation in Missouri[1] |
| Country | United States |
| Type section | |
| Named for | Outcrops along the Eau Claire River, Eau Claire County, Wisconsin[1] |
| Named by | E. O. Ulrich |
The Eau Claire Formation is a geologic formation in the north central United States. It preserves trilobite fossils from the Cambrian Period.[1]
References
- 1 2 3 4 "Eau Claire Formation". Indiana Geological Survey. Retrieved 2015-05-18.
Sources
- Aswasereelert, Wasinee; Simo, J.A. (Toni); LePain, David L. (2008). "Deposition of the Cambrian Eau Claire Formation, Wisconsin: hydrostratigraphic implications of fine-grained cratonic sandstones" (PDF). Wisconsin Geological and Natural History Survey. 19 (1).
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.
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