Trenton Formation
The Trenton Formation is a geologic formation in Michigan, Ohio, and Indiana. It preserves fossils dating back to the Ordovician period.[2][3]
| 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 |  .svg.png){kind=small} |
| Extent | Appalachia, Midwestern and Southeastern United States |
See also
References
- Paleozoic Sedimentary Successions of the Virginia Valley & Ridge and Plateau
- "Trenton Limestone". Indiana Geological and Water Survey. Indiana University. Retrieved 6 July 2020.
- Orton, Edward (1889). "THE TRENTON LIMESTONE AS A SOURCE OF PETROLEUM AND INFLAMMABLE GAS IN OHIO AND INDIANA, in Eighth Annual report of the United States Geological Survey to the Secretary of the Interior, 1886-1887: Part 2". USGS. pp. 547–556. Retrieved 6 July 2020.
- 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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