Middlesex Formation
The Middlesex Formation is a carbon rich black shale geologic formation found in the Appalachian Basin. It represents one of several transgressive events (rising sea levels) during the Late Devonian.
| Middlesex Formation | |
|---|---|
| Stratigraphic range: Frasnian | |
| Type | Formation |
| Unit of | Sonyea Group |
| Underlies | Cashaqua Shale or Pulteney shale |
| Overlies | Genesee Group |
| Thickness | 6–75 feet (23 m) |
| Lithology | |
| Primary | Black Shale |
| Location | |
| Region | |
| Country | United States |
| Type section | |
| Named for | Town of Middlesex, NY |
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