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## By Year

map        January 1, 1967        Aeromagnetic and generalized geologic map of southeastern Pennsylvania

Featured Films and Shorts        April 8, 2024        USGS Northeast Region: The Short Story

publication        January 1, 1997        Activities of the United States Geological Survey in Pennsylvania

publication        January 1, 1998        U.S. Geological Survey cooperative water-resources programs in Chester County, Pennsylvania

publication        January 1, 1996        Borehole geophysical logging for water-resources investigations in Pennsylvania

publication        March 1, 2018        Freshwater mussel salvage and relocation at the Pond Eddy Bridge, Delaware River, New York and Pennsylvania

publication        July 9, 2019        Predictive analysis using chemical-gene interaction networks consistent with observed endocrine activity and mutagenicity of U.S. streams

map        January 1, 2007        Altitude and configuration of the potentiometric surface in the upper White Clay Creek and lower West Branch Brandywine Creek Basins including portions of Penn, London Grove, New Garden, Londonderry, West Marlborough, Highland, and East Fallowfield Townsh

publication        January 1, 1983        Water-quality assessment of Francis E. Walter Reservoir, Luzerne and Carbon counties, Pennsylvania

map        January 1, 2006        Altitude and configuration of the potentiometric surface in the Lower White Clay Creek and Upper Christina River Basins including portions of Franklin, London Britain, New Garden, and New London Townships, Chester County, Pennsylvania, June through Septem

publication        January 1, 1988        U.S. Geological Survey ground-water studies in Pennsylvania