Trenton Group
| Trenton Group | |
|---|---|
| Stratigraphic range: Middle-Upper Ordovician ~ | |
Lingulae in Trenton Group limestone from Canada | |
| Type | Group |
| Sub-units |
|
| Underlies | Medina Group |
| Overlies | Black River & Plattin Formation |
| Lithology | |
| Primary | Limestone |
| Other | Chert |
| Location | |
| Region | Indiana, Michigan, Ohio, Pennsylvania, Virginia, West Virginia, Ontario |
| Country | United States, Canada |
| Extent | Appalachia, Midwestern and Southeastern United States |
| Type section | |
| Named for | Trenton Falls, New York |
| Named by | Lardner Vanuxem in 1838 |
The Trenton Group or Trenton Limestone is a geologic group in Kentucky, Michigan, Ohio, New York, Indiana, Pennsylvania, West Virginia, and Ontario. It dates back to the Ordovician period and is primarily composed of limestone. The Trenton Limestone has served as a gas field in several states.