Maps
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USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Our programs produce accurate geologic maps and 3-D geologic frameworks that provide critical data for sustaining and improving the quality of life and economic vitality of the Nation. They also organize, maintain, and publish the geospatial baseline of the Nation's topography, natural landscape, built environment and more.
Geologic Maps
Geologic Maps
Map Releases
Map Releases
Topo Maps
Topo Maps
Volcanic Maps
Volcanic Maps
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All Maps
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Map showing changes in shoreline of Martha's Vineyard, Massachusetts, during the past 200 years Map showing changes in shoreline of Martha's Vineyard, Massachusetts, during the past 200 years
The history of the coast of Martha's Vineyard is mostly a story of erosion, although locally the shore has alternately advanced and retreated. Erosion of the island's shores has, in fact, been going on for thousands of years, and although we know little about the erosion of distant times, it is quite possible that the rate of erosion was about the same as now; about 16 acreas are lost to...
Map showing concentration of dissolved solids in water from the principal aquifer, Sugar House quadrangle, Salt Lake County, Utah Map showing concentration of dissolved solids in water from the principal aquifer, Sugar House quadrangle, Salt Lake County, Utah
The concentration of dissolved solids in water from the principal aquifer ranges from about 100 mg/l (milligrams per liter) to as much as 800 mg/l. Water containing the least dissolved solids occurs in an arcuate, mile-wide band along the southern border of the Sugar House quadrangle. Water containing the most dissolved solids occurs in a 3½-mile–wide band in the northern part of the...
Map showing configuration of the potentiometric surface of the principal aquifer and its approximate position relative to land surface, Sugar House quadrangle, Salt Lake County, Utah, February 1972 Map showing configuration of the potentiometric surface of the principal aquifer and its approximate position relative to land surface, Sugar House quadrangle, Salt Lake County, Utah, February 1972
The potentiometric surface is an imaginary surface representing the static head of ground water and defined by the levels to which ground water would rise in tightly cased wells. The potentiometric surface of the principal aquifer within the area of the Sugar House quadrangle ranges from about 20 feet above, to as much as 500 feet below land surface as is shown on the map. The principal...