1. Potentiometric surface map for the Cretaceous Aquifer, Virginia Coastal Plain, 1978 [cartographic material] Yale Public content 1981. 2023-01-06T18:46:22Z. 2023-01-10T22:36:16Z. Geological Survey (U.S.). Dept. of the Interior, United States Geological Survey. English. cartographic image. Public. Virginia and Virginia.