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Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.
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Photogeologic map of the Desert Lake-2 quadrangle, Emery and Carbon Counties, Utah
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Topographic map of the Nereidum Montes region of Mars
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Geology, structure, and uranium deposits of the Marble Canyon 1 degree x 2 dgrees Quadrangle, Arizona
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Geologic map of the Eridania Quadrangle of Mars
The Eridania quadrangle is located within the densely cratered terrain of the southern hemisphere of Mars, east of the large circular Hellas Basin. The areas contain three distinct physiographic provinces that div ide the quadrangle into latitud in al belts. The northern part of the quadrangle is dominated by cratered upland plateau, the central part by plains, the southern part by a mottled surface of rugged topography and a high density of craters subdued by erosion. In general, the oldest geologic unit occurs in the upland terrain, the youngest in the central lowlands. Large contrast in albedo were observed on Mars from Earth long before Mariner spaceflight missions. The most conspic uous of these features within the quadrangle are areas of low albedo in the north and in the south that corresponds to the two main belts of high-relief terrain. The intervening region of high albedo corresponds to the central plains belt, also an area of recurrent seasonal frost. The southern polar cap extends to about 50 ˚ S lat and includes all of the southern belt of high relief.
Maps and diagrams showing structural control of the Hamme Tungsten deposit, Vance County, North Carolina
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Geologic map of the San Juan Quadrangle, Puerto Rico
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Leasable mineral and waterpower land classification map of the Billings 1° x 2° quadrangle, Montana and Wyoming
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Leasable mineral and waterpower land classification map of the Cut Bank 1° x 2° quadrangle, Montana
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Leasable mineral and waterpower land classification map of the Glasgow 1° x 2° quadrangle, Montana
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Leasable mineral and waterpower land classification map of the Havre 1° x 2° quadrangle, Montana
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Leasable mineral and waterpower land classification map of the Kalispell 1° x 2° quadrangle, Montana
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Leasable mineral and waterpower land classification map of the Shelby 1° x 2° quadrangle, Montana
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Map showing geology, wildcat wells, Tertiary plant fossil localities, K-AR age dates, and petroleum operations, Cook Inlet area, Alaska
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Geologic map of the pre-Tertiary rocks in the eastern Aldrich Mountains and adjacent areas to the south, Grant County, Oregon
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Geologic map of the Pueblo 1 x 2 Quadrangle, south-central Colorado
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Topographic map of the Amenthes Quadrangle of Mars
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