Utica Shale
The Utica Shale is a stratigraphical unit of Upper Ordovician age in the Appalachian Basin. It underlies much of the northeastern United States and adjacent parts of Canada.
| Utica Shale | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Underlies | Lorraine Shale, Martinsburg Formation, and Reedsville Formation |
| Overlies | Trenton Group Canajoharie shale |
| Thickness | up to 1,000 feet (300 m) |
| Lithology | |
| Primary | Shale |
| Location | |
| Coordinates | 43.064°N 75.18°W |
| Region | Appalachian Basin |
| Country | Canada United States |
| Type section | |
| Named for | Utica, New York |
| Named by | Ebenezer Emmons, 1842 |
It takes the name from the city of Utica, New York, as it was first described as an outcrop along the Starch Factory Creek east of the city by Ebenezer Emmons in 1842.
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