// Workers AI · dad joke modeWhat did the Schoharie Formation say? "I'm a rock-solid friend.
| Schoharie Formation | |
|---|---|
| Stratigraphic range: Devonian | |
| Type | Formation |
| Sub-units |
|
| Underlies | Onondaga Limestone |
| Overlies | Esopus Formation |
| Lithology | |
| Primary | Siltstone, sandstone |
| Other | Limestone |
| Location | |
| Region | New York, Pennsylvania, Virginia |
| Country | United States |
| Type section | |
| Named for | Schoharie, NY |
The Schoharie Formation is a Devonian formation found in outcrop in New York, New Jersey, Pennsylvania, and Virginia. Also known as the "Schoharie Grit" in central New York, due to the "gritty" consistency of the formation. The "grit" is describing the silt and sand that is interbedded in the formation[1]
Description
[edit]The Schoharie is made up of finer grained siliciclastics and calcareous material, with the formation becoming less calcareous towards the top.[2]
Stratigraphy
[edit]The upper section is known as the Leeds Member. It is composed of calcareous mudstones and siltstones which become cherty and more argillaceous moving upwards. Below is the Carlisle Center Member and it consists of laminated and flaggy calcareous mudstones or siltstones. Fossils are more common in the upper Leeds Member. The Schoharie lies comfortably over the Esopus. The boundary between the Schoharie and the Onondaga is gradational. [3]
Fossils
[edit]Atrypaimpressa (Hall)
Chonetes hemisphericus (Hall)
Elytha fimbriata (Conrad)
Leptaena rhomboidalis (Wilckens)
Spirifer macrus (Hall), T
Trilobite: Synphoria anchiops (Hall)
References
[edit]- ↑ Fisher, Donald W. (9 December 2023). "DEVONIAN STRATIGRAPHY AND PALEOECOLOGY IN THE CHERRY VALLEY, NEW YORK REGION" (PDF). Otto's Website. Retrieved 9 December 2023.
- ↑ Bartholomew, Alex; Ver Straeten, Charles (7 August 2023). "Lower and Middle Devonian Strata of New York State: Genesee River Valley to the Hudson Valley" (PDF). Geneseo State University of New York. Retrieved 9 December 2023.
- ↑ Dunn, James R.; Rickard, Lawrence V. "SILURIAN AND DEVONIAN ROCKS OF THE CENTRAL HUDSON VALLEY" (PDF). Ottomuller.
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- Devonian geology of New York (state)
- Devonian Pennsylvania
- Siltstone formations of the United States
- Sandstone formations of the United States
- Limestone formations of the United States
- Geologic formations of New York (state)
- Geologic formations of Pennsylvania
- Devonian geology of New Jersey
- Geologic formations of New Jersey
- Devonian geology of Virginia
- Geologic formations of Virginia
- Geologic formation stubs