Baltimore Gneiss
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The Baltimore Gneiss is a Precambrian geological formation in the Piedmont region of Maryland, Pennsylvania, and Delaware.
Photomicrograph of Baltimore Gneiss
Outcrop of Baltimore Gneiss along the Patapsco River, Carroll County
Illustration of an inclusion of the Baltimore Gneiss within the Woodstock Quartz Monzonite
The Grace Methodist Episcopal Church in Baltimore City, an example of a building built in part from "Falls Road blue gneiss."
Patapsco River
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The Patapsco River mainstem is a 39-mile river in central Maryland that flows into the Chesapeake Bay. The river's tidal portion forms the harbor for the city of Baltimore. With its South Branch, the
Patapsco Valley State Park at Catonsville
The Inner Harbor viewed from the Baltimore Aquarium
Liberty Reservoir
Volunteers at a community cleanup of Herbert Run, a tributary of the Patapsco River running through Arbutus, Maryland