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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
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Geologic map of the South Boston 30' × 60' quadrangle, Virginia and North Carolina Geologic map of the South Boston 30' × 60' quadrangle, Virginia and North Carolina
This 1:100,000-scale geologic map of the South Boston 30’ × 60’ quadrangle, Virginia and North Carolina, provides geologic information for the Piedmont along the I–85 and U.S. Route 58 corridors and in the Roanoke River watershed, which includes the John H. Kerr Reservoir and Lake Gaston. The Raleigh terrane (located on the eastern side of the map) contains Neoproterozoic to early...
March 17, 2022—Kīlauea summit thermal maps March 17, 2022—Kīlauea summit thermal maps
A helicopter overflight on March 17, 2022, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea.
March 4, 2022 - Kīlauea summit eruption reference map March 4, 2022 - Kīlauea summit eruption reference map
This reference map depicts the ongoing Kīlauea summit eruption on March 4, 2022.
March 2, 2022—Kīlauea summit thermal maps March 2, 2022—Kīlauea summit thermal maps
A helicopter overflight on March 2, 2022, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea.
Bathymetric map, surface area, and stage-capacity for the U.S. part of Lake Koocanusa, Lincoln County, Montana, 2016–18 Bathymetric map, surface area, and stage-capacity for the U.S. part of Lake Koocanusa, Lincoln County, Montana, 2016–18
The U.S. Geological Survey and U.S. Army Corps of Engineers collected high-resolution multibeam sonar data during 2016–18 to compute stage-area and stage-capacity tables for the U.S. part of Koocanusa Reservoir in Lincoln County, northwestern Montana. Koocanusa Reservoir is a transboundary reservoir extending about 48 miles from Libby Dam upstream to the U.S. international boundary with...
January 28, 2022—Kīlauea summit eruption reference map January 28, 2022—Kīlauea summit eruption reference map
This reference map depicts the ongoing Kīlauea summit eruption on January 28, 2022.
January 25, 2022—Kīlauea summit thermal maps January 25, 2022—Kīlauea summit thermal maps
A helicopter overflight on January 25, 2022, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea.
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January 7, 2022—Kīlauea summit eruption reference map January 7, 2022—Kīlauea summit eruption reference map
This reference map depicts the ongoing Kīlauea summit eruption on January 7, 2022.
Geologic map of the Silver Zone Pass quadrangle, Elko County, Nevada Geologic map of the Silver Zone Pass quadrangle, Elko County, Nevada
This 1:24,000-scale geologic map of the Silver Zone Pass quadrangle lies in the southern Toano Range in Elko County, Nevada. Metamorphic and sedimentary strata of the quadrangle range from Neoproterozoic to Permian in age. Important intrusions include the Late Jurassic (ca. 159 Ma) Silver Zone Pass pluton and Cretaceous Toano Spring pluton. In particular, the Silver Zone Pass pluton...
Regional water table in the Antelope Valley and Fremont Valley groundwater basins, Southwestern Mojave Desert, California, March 2014 Regional water table in the Antelope Valley and Fremont Valley groundwater basins, Southwestern Mojave Desert, California, March 2014
Water levels were measured during March 2014 in wells in the Antelope Valley and Fremont Valley groundwater basins, southwestern Mojave Desert, California, in cooperation with the Antelope Valley-East Kern Water District, Palmdale Water District, and Littlerock Creek Irrigation District. A regional water-table map was constructed. Historical water-level data from the USGS National Water
Geologic map of the Middendorf quadrangle, Chesterfield County, South Carolina Geologic map of the Middendorf quadrangle, Chesterfield County, South Carolina
The Middendorf 7.5-minute quadrangle is located entirely within the Carolina Sandhills region of the upper Atlantic Coastal Plain province in Chesterfield County, South Carolina. The Carolina Sandhills, which has been recognized as a separate region for a long time (e.g., McGee, 1890, 1891; Holmes, 1893), extends from central North Carolina across South Carolina to the western border of...
December 21, 2021—Kīlauea summit thermal maps December 21, 2021—Kīlauea summit thermal maps
A helicopter overflight on December 21, 2021, at approximately 7:30 a.m. HST allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea.