Trenton Formation
 | This article needs additional citations for verification. (October 2017) |
| Trenton Formation | |
|---|---|
| Stratigraphic range: Middle-Upper Ordovician | |
 Trenton Formation in Canada | |
| Type | Formation |
| Sub-units | Groos Quarry & Chandler Falls Members |
| Underlies | Collingwood Shale, Point Pleasant Formation & Scales Shale |
| Overlies | Black River & Plattin Formation |
| Lithology | |
| Primary | Limestone |
| Location | |
| Region | Indiana, Michigan, Ohio, and Virginia[1] |
| Country |  United States Canada |
| Extent | Appalachia, Midwestern and Southeastern United States |
The Trenton Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period.
See also
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.
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 | This article about a specific stratigraphic formation in Michigan is a stub. You can help Wikipedia by expanding it. |