The Delaware Geological Survey maintains detailed records on outcrops located throughout the state. These records are completed by geologists when visiting the outcrop locations during field work. Many outcrops are on private property; however, we have selected several in the Piedmont area that are easily accessible and allow you to see some of the fascinating geology underlying northern Delaware. Each of the outcrops shown on this map has a small write up describing the mineralogical and structural details that can been seen in the rock outcrop. Please make sure to be respectful of property while observing these geologic treasures.
Outcrop Bc44-f: The Tatnall Preschool Grounds
Outcrop Bc44-f: The Tatnall Preschool Grounds
39.771024, -75.61
Outcrop Cb42-c: Windy Hills Bridge Outcrop
Outcrop Cb42-c: Windy Hills Bridge Outcrop
39.69222, -75.72
Outcrop Cb15-c: The Confluence Quarry at North Pointe
Outcrop Cb15-c: The Confluence Quarry at North Pointe
39.746389, -75.68
Outcrop Ca44-d2: The Christianstead Subdivision
Outcrop Ca44-d2: The Christianstead Subdivision
39.695001, -75.78
Outcrop Be22-e: Ardentown Railside Boulders
Outcrop Be22-e: Ardentown Railside Boulders
39.808468, -75.48
Outcrop Be23-g: Charnockite Boulders in the South Branch of Naaman Creek
Outcrop Be23-g: Charnockite Boulders in the South Branch of Naaman Creek
39.809815, -75.45
Outcrop Bd21-a: Boulder Field at Brandywine Creek State Park
Outcrop Bd21-a: Boulder Field at Brandywine Creek State Park
39.806667, -75.58
Outcrop Be22-k: Charnockite Boulders at Ardentown
Outcrop Be22-k: Charnockite Boulders at Ardentown
39.812492, -75.48
Outcrop Bd44-b: Bringhurst Gabbro boulders in Shellpot Creek
Outcrop Bd44-b: Bringhurst Gabbro boulders in Shellpot Creek
39.772776, -75.52
Outcrop Bd41-b: Rockford Park Gneiss Boulders at Rockford Park
Outcrop Bd41-b: Rockford Park Gneiss Boulders at Rockford Park
39.768053, -75.57
Outcrop Bd42-e: The Cliffs of Alapocas Woods
Outcrop Bd42-e: The Cliffs of Alapocas Woods
39.769445, -75.56
Outcrop Da15-h: The Paraglacial Boulder Feature of Chestnut Hill
Outcrop Da15-h: The Paraglacial Boulder Feature of Chestnut Hill
39.654168, -75.76
Outcrop Ba14-a: The Setters Formation at Avondale Quarry
Outcrop Ba14-a: The Setters Formation at Avondale Quarry
39.82434, -75.776158
Outcrop Bc32-a: The Mt. Cuba Picnic Grove
Outcrop Bc32-a: The Mt. Cuba Picnic Grove
39.789718, -75.64
Outcrop Bc32-b: The Mt. Cuba Railroad Cut
Outcrop Bc32-b: The Mt. Cuba Railroad Cut
39.792497, -75.64
Outcrop Cc12-a: The Cave at Brandywine Springs
Outcrop Cc12-a: The Cave at Brandywine Springs
39.745832, -75.638328
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