Patapsco Formation
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. [1][2] It preserves fossils such as plants and molluscs dating back to the Cretaceous period.[1]
| 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 | W. B. Clark, 1897[1] |
See also
References
- Clark, W.B., 1897, Outline of present knowledge of the physical features of Maryland: Maryland Geological Survey Volume Series, v. 1, pt. 3, p. 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". Retrieved 17 December 2021.
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