The complex geologic framework of the Fall Zone in Delaware is primarily caused by diverse structural features present in the crystalline basement rocks that have exerted a considerable influence on the distribution of the overlying sediments of the Coastal Plain.
Please give proper credit to the Delaware Geological Survey.
Woodruff, K.D., 1972, Geology of the Fall Zone in Delaware: Delaware Geological Survey Report of Investigation 19.
Delaware Geological Survey
University of Delaware
Delaware Geological Survey Building
Newark, DE 19716
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