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Prince George's County
Click on a tile to display information about the associated rock types or formations.
Baltimore Gabbro Complex (Early Paleozoic- Late Precambrian ?) Lower Pelitic Schist (Late Precambrian ?) Boulder Gneiss (Late Precambrian ?) Nanjemoy Formation (Eocene) Matawan Formation (Cretaceous) Magothy Formation (Cretaceous)
Potomac Group (Cretaceous) Nanjemoy Formation (Eocene) Calvert Formation (Miocene) Aquia Formation (Paleocene) Upland Deposits -Western Shore (Quaternary) Lowland Deposits (Quaternary)