Patapsco Formation
Fossil-rich geologic formation on the East Coast of the United States
Patapsco Formation | |
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Stratigraphic range: Albian–Cenomanian PreꞒ Ꞓ O S D C P T J K Pg N | |
![]() 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 | ![]() ![]() |
Country | ![]() |
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.[1][2] It preserves fossils such as plants and molluscs dating back to the Cretaceous period.[1]
See also
- List of fossiliferous stratigraphic units in Virginia
- List of fossiliferous stratigraphic units in Maryland
- Paleontology in Virginia
- Paleontology in Maryland
References
- ^ a b c 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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