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Rancocas Formation

Rancocas Formation - Grayish-green and green, silty, glauconitic sand.
State Delaware
Name Rancocas Formation
Geologic age Tertiary
Comments Eocene/Paleocene, may be overlain locally by the Pleistocene Columbia Formation
Primary rock type sand
Secondary rock type
Other rock types
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Sandglauconitic
Map references
Spoljaric, Nenad and Jordan, Robert R., 1966, Generalized Geologic Map of Delaware, State of Delaware, Delaware Geological Survey, scale ca. 1:300,000.
Unit references
Spoljaric, Nenad and Jordan, Robert R., 1966, Generalized Geologic Map of Delaware, State of Delaware, Delaware Geological Survey, scale ca. 1:300,000.
Counties New Castle