Northern Atlantic Coastal Plain
The history of geological study of the Cretaceous deposits of the Northern Atlantic Coastal Plain was reviewed by Owens, et al. (1970). Geologic studies of these rocks has been hampered by low relief, dense vegetative cover, thick soils, repeated facies, poor preservation of invertebrates, and many other factors. Data and diagrams presented by Owens et al. indicate the Late Cretaceous sediments thin southward and some units pinch out before reaching the Delmarva Peninsula leaving the Merchantville, Englishtown, Marshalltown, and Mount Laurel Sand (oldest to youngest) representing a series of clastic and calcareous clastic lithosomes deposited in nearshore environments along the wester margin of the opening Atlantic Ocean. These sediments along the Delmarva Peninsula have yielded a diverse and abundant decapod fauna collected by Harry Mendryk from dredging soil exhumed from the Chesapeake & Delaware Canal during the 1970‘s, mostly assignable to the early Campanian Merchantville Formation.