Volcanic Complex of Cecil County

Metamorphosed andesitic and dacitic volcanic rocks (greenstone, greenschist, quartz amphibolite, and schistose felsite); amygdules and volcano-clastic textures locally preserved; thickness unknown.
State Maryland
Name Volcanic Complex of Cecil County
Geologic age Late Precambrian (?)
Lithologic constituents
Metamorphic > Metaigneous > Greenstone
Metamorphic > Amphibolite
Metamorphic > Schist (Greenschist)

Cleaves, E.T., Edwards, J., Jr., and Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, Baltimore, Maryland, scale 1:250,000.

In 1995 the Water Resources Division of the U.S. Geological Survey digitized the geologic map of Maryland from the 1968 paper map (Reference MD001). Information about products from the Maryland Geological Survey can be found at http://www.mgs.md.gov/.

NGMDB product
Counties Cecil - Harford