Patapsco Formation

Last updated
Patapsco Formation
Stratigraphic range: Albian–Cenomanian
Patapsco Formation.png
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
Thickness200 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. [1] [2] It preserves fossils such as plants and molluscs dating back to the Cretaceous period. [1]

See also

References

  1. 1 2 3 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.
  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.