DGS Publications

Title Authors Publication Date
RI55 Geology of the Milford and Mispillion River Quadrangles Ramsey, K.W., Groot, J.J.
RI50 Plant Microfossils of the Calvert Formation of Delaware Groot, J.J.
RI47 Ages of the Bethany, Beaverdam, and Omar Formations of Southern Delaware Groot, J.J., Ramsey, K.W., Wehmiller, J.F.
RI8 Evaluation of the Water Resources of Delaware Baker, W.W., Varrin, R.D., Groot, J.J., Jordan, R.R.
B3 Marine Upper Cretaceous Formations of the Chesapeake and Delaware Canal Organist, D.M., Richards, H.G., Groot, J.J.
B2 Geology and Ground-Water Resources of the Newark Area, Delaware with a Section on the Surface Water Resources Groot, J.J., Rasmussen, W.C., Hulme, A.E.