Downloads and Data
Data files are usually found here. However, also check Abstract and elsewhere on this page for additional links. Geography
Publication Bounding Box
Delawareâs oldest rocks are metamorphic crystalline rocks of the central Appalachian Piedmont Physiographic Province. Atlantic Coastal Plain sediments overlie the crystalline rocks of the Piedmont and range in thickness from a feather edge at the Fall Line to approximately 9,000 feet in the southeastern corner of Delaware. Sediments range in age from Early Cretaceous to Holocene.