Annapolis in Anne Arundel County, Maryland — The American Northeast (Mid-Atlantic)
Mahoning Sandstone
(Waffle Rock)
Rock Class: Sedimentary
Age: 300 million years
Maryland has many interesting geological features. This sandstone builder shows an unusual naturally occurring geometric pattern. Years of consolidating, folding and fracturing have resulted in a rock with many crevices filled with deposits of iron oxide. Over time the sandstone has worn away to reveal the more resistant iron oxide grid resembling a giant breakfast waffle. This specimen was discovered in Garrett County during a construction project, and is courtesy of the Maryland Geological Survey and the Maryland State Highway Administration.
Topics. This historical marker is listed in these topic lists: Industry & Commerce • Natural Features.
Location. 38° 59.121′ N, 76° 30.163′ W. Marker is in Annapolis, Maryland, in Anne Arundel County. It can be reached from Taylor Avenue (Maryland Route 435) south of Rowe Boulevard ( Route 70), on the right when traveling north. Touch for map. Marker is at or near this postal address: 580 Taylor Ave, Annapolis MD 21401, United States of America. Touch for directions.
Regionally, this marker is in Central Maryland. It is
this page online
Other nearby markers. At least 8 other markers are within walking distance of this marker: The Helen Avalynne Tawes Garden (within shouting distance of this marker); Taste (within shouting distance of this marker); Streamside Community (within shouting distance of this marker); Tulip Poplar (about 300 feet away, measured in a direct line); "Ducks Breaking Away" (about 300 feet away); Charlotte J. Huse (about 300 feet away); Maryland Department of Natural Resources Tawes Parking Lot Rain Gardens (about 400 feet away); Navy-Marine Corps Memorial Stadium (approx. 0.2 miles away). Touch for a list and map of all markers in Annapolis.
Credits. This page was last revised on November 1, 2026. It was originally submitted on November 1, 2026, by Devry Becker Jones of Washington, District of Columbia. This page has been viewed 9 times since then. Photos: 1, 2. submitted on November 1, 2026, by Devry Becker Jones of Washington, District of Columbia.
