Unconsolidated > Fine-detrital > SiltGreenish-gray sandy and clayey glauconitic silt
|Comments||Paleocene, may be overlain locally by the Pleistocene Columbia Formation|
Spoljaric, Nenad and Jordan, Robert R., 1966, Generalized Geologic Map of Delaware SP4, State of Delaware, Delaware Geological Survey, scale ca. 1:300,000. Digitized by the Water Resources Division of the U.S. Geological Survey in the mid 1990's.