Suggested Citation
Poth, C. W., 1968, Hydrology of the metamorphic and igneous rocks of central Chester County, Pennsylvania: Pennsylvania Geological Survey, 4th ser., Water Resource Report 25, 84 p. [Available online.]
Description
A detailed study of groundwater resources in the West Chester, Unionville, Coatesville, and Parkesburg 7.5-minute quadrangles, covering central Chester County and small portions of Delaware and Lancaster Counties. The lithologies include gneiss, schist, pegmatite, marble, gabbro, quartzite, dolomite, limestone, and diabase, ranging in age from Precambrian to Triassic. Research included an inventory of 620 wells with 1-hour pumping tests on 94 of them, electric logs on 5 of them, and periodic water-level measurements on 3 of them. Analytical data were collected on more than 400 water samples. The results of all of these measurements are presented in numerous tables and graphs. The hydrologic properties of each stratigraphic unit are described in detail. The report includes three plates. Two plates have 1:24,000-scale geologic maps, one showing the West Chester and Unionville quadrangles, one showing the Coatesville and Parkesburg quadrangles, and both showing well locations. The third plate has a graph showing water-level fluctuations in one well compared to recorded precipitation from August 1963 through December 1965.