Rock Stream Formation | |
---|---|
Stratigraphic range: Frasnian | |
Type | Formation |
Unit of | Sonyea Group |
Underlies | Cashaqua Shale |
Overlies | Pulteney shale |
Lithology | |
Primary | Siltstone |
Other | Shale |
Location | |
Region | New York |
Country | United States |
The Rock Stream Formation (or Rock Stream siltstone[1]) is a geologic formation in New York. It preserves fossils dating back to the Devonian period.