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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
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Map Releases
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Topo Maps
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Geochemical map of the Mount Eddy and Castle Crags Roadless Areas, Shasta, Siskiyou, and Trinity counties, California Geochemical map of the Mount Eddy and Castle Crags Roadless Areas, Shasta, Siskiyou, and Trinity counties, California
The Mount Eddy and Castle , Crags Roadless Areas occupy 9,600 acres (39 km2) and 3,300 acres (13 km2), respectively, in Shasta, Siskiyou, and Trinity Counties, Calif., approximately 8 mi (13 km) west of the towns of Mount Shasta City and Dunsmuir (fig. 1). Access is provided by secondary roads and trails from Interstate Highway 5, which passes through Mount Shasta City and Dunsmuir. The...
Geochemical map showing anomalous concentrations of selected elements in stream sediments from the Golden Trout Wilderness, California Geochemical map showing anomalous concentrations of selected elements in stream sediments from the Golden Trout Wilderness, California
The Golden Trout Wilderness occupies 457 square miles in the southern Sierra Nevada range of California, south of Sequoia National Park. The study area includes at least a part of the Kern Peak, Olancha, Mineral King, Hockett Peak, Camp Nelson, and Manache Mountain 15-minute quadrangle maps. It is contained totally within lands belonging to the Inyo and Sequoia National Forests.
Geochemical map showing anomalous concentrations of selected elements in the nonmagnetic heavy-mineral concentrates from the Golden Trout Wilderness, California Geochemical map showing anomalous concentrations of selected elements in the nonmagnetic heavy-mineral concentrates from the Golden Trout Wilderness, California
The Golden Trout Wilderness occupies 457 square miles in the southern Sierra Nevada range of California, wouth of Sequoia National Park. The study area includes at least a part of Kern Peak, Olancha, Mineral King, Hockett Peak, Camp Nelson, and Monache Mountain 15 minute quadrangle maps. It is contained totally within lands belonging to the Inyo and Sequoia National Forests.
Geochemical maps of Bunk Robinson Peak and Whitmire Canyon Roadless Areas, Hidalgo County, New Mexico, and Cochise County, Arizona Geochemical maps of Bunk Robinson Peak and Whitmire Canyon Roadless Areas, Hidalgo County, New Mexico, and Cochise County, Arizona
Geochemical sampling of the Bunk Robinson Peak and Whitmire Canyon Roadless Areas was completed in the spring of 1980. The purpose of the geochemical sampling was to determine if certain metals, and "pathfinder" elements in heavy-mineral concentrates and stream sediments are enriched beyond normal black-ground amounts. The enrighment of elemental contents above background amounts in...
Geochemical maps of the Selway-Bitterroot Wilderness, Idaho County, Idaho, and Missoula and Ravalli counties, Montana Geochemical maps of the Selway-Bitterroot Wilderness, Idaho County, Idaho, and Missoula and Ravalli counties, Montana
The Selway-Bitterroot Wilderness covers almost 2,000 mi2 in east-central Idaho and western Montana (fig. 1). The wilderness lies across the Bitterroot Range, which forms the boundary between Idaho and Montana, and includes large portions of the drainages of the Selway, Lochsa, and Bitterroot Rivers. Elevations range from 1,800 ft on the Selway River near the wilderness boundary to 10,157...