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Baltimore County - Southeast

 

Click on a tile to display information about the associated rock types or formations.
Pegmatite Dikes (Paleozoic)
 Diabase Sills and Dikes (Triassic)
Woodstock Quartz Monzonite (Paleozoic)
 Baltimore Gneiss (Precambrian)
Wissahickon Formation Undifferentiated (Late Precambrian ?)
 Volcanic Complex of Cecil County (Late Precambrian ?)
Upper Pelitic Schist (Late Precambrian ?)
 James Run Formation (Late Precambrian ?)
Metagraywacke (Late Precambrian ?)
 Ellicott City Granodiorite (Paleozoic)
Metaconglomerate (Late Precambrian ?)
Gunpowder Granite (Paleozoic)
Boulder Gneiss (Late Precambrian ?)
Port Deposit Gneiss (Paleozoic)
Lower Pelitic Schist (Late Precambrian ?)
Relay Quartz Diorite (Early Paleozoic- Late Precambrian ?)
Cockeysville Marble (Late Precambrian ?)
Potomac Group (Cretaceous)
Setters Formation (Late Precambrian ?)
Upland Deposits -Western Shore (Quaternary)
Ultramafic Rocks (Early Paleozoic- Late Precambrian ?)
Lowland Deposits (Quaternary)
Baltimore Gabbro Complex (Early Paleozoic- Late Precambrian ?)