Map of Selected Piedmont Outcrops

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 Cc12-c: The Red Clay Creek Edge

Outcrop Cc12-c: The Red Clay Creek Edge

39.745276, -75.64

Outcrop Cb42-c: Windy Hills Bridge Outcrop

Outcrop Cb15-c: The Confluence Quarry at North Pointe

Outcrop Ca44-d2: The Christianstead Subdivision

Outcrop Be32-g: Lesher Park Streambed

Outcrop Be32-g: Lesher Park Streambed

39.79527, -75.48

Outcrop Be22-e: Ardentown Railside Boulders

Outcrop Be21-e: Hanby Park Quarry

Outcrop Be21-e: Hanby Park Quarry

39.814997, -75.49

Outcrop Be23-g: Charnockite Boulders in the South Branch of Naaman Creek

Outcrop Bd21-a: Boulder Field at Brandywine Creek State Park

Outcrop Be22-k: Charnockite Boulders at Ardentown

Outcrop Bd44-b: Bringhurst Gabbro boulders in Shellpot Creek

Outcrop Bd41-b: Rockford Park Gneiss Boulders at Rockford Park

Outcrop Bd42-e: The Cliffs of Alapocas Woods

Outcrop Da15-h: The Paraglacial Boulder Feature of Chestnut Hill

Outcrop Ba14-a: The Setters Formation at Avondale Quarry

Outcrop Bb25-c: The Yorklyn Railroad Cut

Outcrop Bc32-a: The Mt. Cuba Picnic Grove

Outcrop Bc32-b: The Mt. Cuba Railroad Cut

Outcrop Cc12-a: The Cave at Brandywine Springs

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