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 dating back to the Cretaceous period.

Patapsco Formation Stratigraphic range: Albian–Cenomanian PreꞒ Ꞓ O S D C P T J K Pg N
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

• List of fossiliferous stratigraphic units in Virginia
• List of fossiliferous stratigraphic units in Maryland
• Paleontology in Virginia
• Paleontology in Maryland

References

1. 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.
2. 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 31 July 2014. Retrieved 22 June 2014.