| Patapsco Formation | |
|---|---|
| Stratigraphic range: | |
 Outcrop of the Patapsco Formation at Reynold's Mine, Anne Arundel County, Maryland showing the Arundel Formation overlain by the Patapsco Formation | |
| Type | Formation |
| Unit of | Potomac Group |
| Underlies | Raritan Formation |
| Overlies | Arundel Formation |
| Thickness | 200 feet (60 m) |
| Lithology | |
| Primary | clay, sand |
| Other | silt |
| Location | |
| Region | Virginia, Maryland |
| Country | United States |
| Type section | |
| Named for | Patapsco River |
| Named by | William Bullock Clark (1897)1 |
The Patapsco Formation is a geologic formation of varigated clays, sandy clays, and sand in Virginia, the District of Columbia, Maryland, Delaware, Pennsylvania, and in the subsurface of New Jersey.12 It preserves fossils such as plants and molluscs dating back to the Cretaceous period.1
See also
See also
References
References
- Clark, W.B. (1897). Outline of present knowledge of the physical features of Maryland (Report). Volume Series. Vol. 1. Maryland Geological Survey. pp. 172–188.
- Richards, Horace G.; Olmstead, F. H.; Ruhle, James L. (1962). "Generalized structure contour maps of the New Jersey coastal plain" (PDF). New Jersey Geological Survey Reports. 4: 38. Retrieved 28 June 2018.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 19 August 2022. Retrieved 17 December 2021.