Portage Group
The Portage Group, also known as the Nunda Group, Portage Formation, or Portage Shale, are all obsolete, now abandoned, names for fossiliferous, sedimentary strata of Late Devonian age in New York. It was named for extensive outcrops found along the Genesee River in an area formerly included in town of Nunda, now in Portage, New York in the southwest corner of Livingston County.[1]
| Portage Group Stratigraphic range: Devonian | |
|---|---|
| Type | Group |
| Lithology | |
| Primary | shale |
| Other | sandstone, siltstone |
| Location | |
| Region |  |
| Country |  |
References
- Geologic Names Committee, 2018. Geologic Unit: Portage. National Geologic Map Database Geolex — Unit Summary. Reston, Virginia: U.S. Geological Survey.
Notes
- 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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