First Geologic Map (Statewide Generalized Geologic Map)
Published as a Special Publication, this is the first generalized statewide geologic map of Delaware.
Monmouth Formation
Coastal Plain Rock Units (Stratigraphic Chart)
The geology of Delaware includes parts of two geologic provinces: the Appalachian Piedmont Province and the Atlantic Coastal Plain Province. The Piedmont occurs in the hilly northernmost part of the state and is composed of crystalline metamorphic and igneous rocks. This chart summarizes the age and distribution of the geologic units that are recognized in the state by the Delaware Geological Survey.
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RI23 Cretaceous and Tertiary Section, Deep Test Well, Greenwood, Delaware
Analyses of drillers' and geophysical logs, cuttings, and 29 core samples from well Nc13-3 near Greenwood, Sussex County, Delaware indicate that the 1500-foot section penetrated by the drill can be divided into seven rock-stratigraphic units: Matawan Formation, Monmouth Formation, unit A, Piney Point Formation, Chesapeake Group (undifferentiated), Staytonville unit, and the Columbia Formation. The rock units are identified on the basis of texture, mineralogy, color, and interpretation of electric and gamma-ray logs.
HM1 Geohydrology of the Dover, Area, Delaware
Geohydrology of the Dover Aera, Delaware
GM 6 Geology of the Dover Area, Delaware
Subsurface geology of the Dover area, Delaware
GM 5 Geology of the Smyrna-Clayton Area, Delaware
Subsurface geology of the Smyrna-Clayton area, Delaware