Geohydrology of the preglacial Genesee Valley, Monroe County, New York
This report is last in a series of 11 map sets depicting geohydrologic conditions in selected aquifers in upstate New York. Geohydrologic data are compiled on five maps at 1:24,000 scale. Together the maps provide a comprehensive overview of a buried glacio-fluvial aquifer in Monroe County. The maps include surficial geology, geologic sections, bedrock topography, water-infiltration potential of soil zone, potentiometric surface altitude, and land use. The buried-valley deposits consist of ice-contact sand and gravel, till, and glaciolacustrine sand, silt, and clay. The sand and gravel have relatively high permeabilities whereas the till, silt, and clay deposits have relatively low permeabilities. Water-table conditions prevail in unconfined sand and gravel, whereas artesian conditions prevail in the northern part of the system within sand and gravel confined by silty deposits. Recharge occurs principally over the southern part of the aquifer, due to permeable land-surface conditions. Ground-water movement is towards the Irondequoit Bay and Lake Ontario, where discharge occurs. Several communities have wells capable of producing several hundred gallons per minute from the aquifer. The use of land overlying the aquifer is predominantly residential with lesser amounts of industrial uses. (USGS)