Sams Creek Metabasalt

Grayish-green, massive to schistose, amygdaloidal metabasalt.
State Maryland
Name Sams Creek Metabasalt
Geologic age Late Precambrian (?)
Lithologic constituents
Metamorphic > Metaigneous > Metavolcanic > MetabasaltGrayish-green, massive to schistose, amygdaloidal metabasalt

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

NGMDB product
Counties Carroll - Frederick