All Maps
Explore all USGS Maps and refine your search by type, topic, year, location, and advanced search.
Filter Total Items: 9587
Aeromagnetic and gravity maps of the east part of the Raymond Peak Roadless Area, Alpine County, California Aeromagnetic and gravity maps of the east part of the Raymond Peak Roadless Area, Alpine County, California
The Raymond Peak Roadless Area, 60 mi2 (153 km2) in area, is located at the crest of the Sierra Nevada approximately 13 min (21 km) south-southeast of Lake Tahoe. Markleeville, the seat of Alpine County, lies about 1.5 mi (2km) outside the northeast boundary of the area. The rugged topography of this area is dominated by Raymond and Reynolds Peaks at the south end, and Hawkins Peak at...
Aeromagnetic and gravity maps of the Freel and Dardanelles Roadless Areas, Alpine and El Dorado counties, California Aeromagnetic and gravity maps of the Freel and Dardanelles Roadless Areas, Alpine and El Dorado counties, California
The Freel and Dardanelles Roadless Areas comprise 51 mi2 (132 km2) in the central Sierra Nevada south of Lake Tahoe. The Sierra Nevada crest passes through the eastern part of the area. Prominent mountains include Stevens Peak (elev 10,061 ft), Waterhouse Peak (elev 9,497 ft), and Freel Peak (elev 10,881 ft).
Aeromagnetic map and interpretation of geophysical data from the Condrey Mountain Roadless Area, Siskiyou County, California Aeromagnetic map and interpretation of geophysical data from the Condrey Mountain Roadless Area, Siskiyou County, California
The Condrey Mountain Roadless Area lies within the Klamath Mountains geologic province, a province composed of four eastward-dipping imbricate thrust slices or belts consisting predominantly of marine arc-related volcanic and sedimentary rocks, but also including significant amounts of ultramafic and other ophiolitic rocks (Irwin, 1981). From west to east the four Klamath Mountains...