Delaware Geological Survey: University of Delaware, Geological Survey Building, Newark, DE 19716-7501, (302) 831-2833, fax (302) 831-3579
Plank, Margaret O. and William S. Schenck, 1998, Delaware Piedmont Geology, Delaware Geological Survey: University of Delaware, Delaware.
Sporljaric, Nedad, 1979, The Geology of the Delaware Coastal Plain, in eds., Kraft, J.C. and W. Carey, Selected Papers on the Geology of Delaware, Volume 1, p. 115-134, Transactions of the Delaware Academy of Science: Delaware.
