The Geology of Delaware

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Piney Point Formation

Geologic Time Period: 
upper Eocene
Coastal Plain - Primarily Subsurface Unit

Description published in GM14 Geologic Map of Kent County, Delaware, Ramsey, K.W., 2007:

Bright green, fine to coarse, shelly, glauconitic (20 to 40% glauconite), quartz sand. Silty and clayey toward the bottom and coarsens upwards. Considered to be a marine deposit (Benson, Jordan, and Spoljaric, 1985). The Piney Point aquifer coincides with the sandier portion of the unit. Ranges up to 250 feet thick in the southern portion of Kent County.