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Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands
This map layer contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as polygons. The map layer was developed as part of the effort to produce the maps published at 1:2,500,000 in the printed series "Ground Water Atlas of the United States". The published maps contain base and cultural features not included in these data. This is a replacement for the July 1998 map layer called Principal Aquifers of the 48 Conterminous United States.
Development and application of a fibre optic fluorimeter for in situ tracer concentration measurements in groundwater and soil
Reconstruction of past climates from stable isotope records of palaeo-precipitation preserved in continental archives
Environmental impact of metalliferous black shales at Talvivaara in Finland, with indication of lake acidification 9000 years ago
Need exists for enhanced hydrogeologic investigation and scientific input to groundwater resource policy in Virginia