Casselman Formation
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Geological formation in the United States
| Casselman Formation | |
|---|---|
Monongahela Group | |
| Overlies | Glenshaw Formation |
| Lithology | |
| Primary | shale, siltstone, sandstone, red beds, coal |
| Other | limestone |
| Location | |
| Region | Appalachian Plateau |
| Country | United States |
| Extent | Ohio, Pennsylvania, Maryland, West Virginia |
| Type section | |
| Named for | Casselman River |
| Named by | N. K. Flint, 1965[1] |
The Casselman Formation mapped
Monongahela Group
.
The Conemaugh Group consists of cyclic sequences of shale, siltstone, sandstone, red beds, thin impure limestone, and thin nonpersistent coal. Red beds are associated with landslides.[3]
The thickness of the Conemaugh Group averages about 400 feet in Ohio, and it ranges from 450 feet on the Ohio River in West Virginia to 520 feet in Washington County, Pennsylvania, and then to 890 feet in Somerset County, Pennsylvania.[4]
Fedexia remains are among the fossils that have been recovered from the formation.
Footnotes
- ^ Flint, N.K., 1965, Geology and mineral resources of southern Somerset County, Pennsylvania: Pennsylvania Geological Survey County Report, 4th series, no. 56A, 267 p.
- ^ Assessment of Appalachian Basin Oil and Gas Resources: Carboniferous Coal-bed Gas Total Petroleum System http://pubs.usgs.gov/of/2004/1272/2004-1272.pdf
- ^ Casselman Formation https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=PAPAcc;6
- ^ Assessment of Appalachian Basin Oil and Gas Resources: Carboniferous Coal-bed Gas Total Petroleum System http://pubs.usgs.gov/of/2004/1272/2004-1272.pdf Citing Arkle and others, 1979; Collins; 1979; Edmunds and others, 1999
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