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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.
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Logs and data from the Starthistle trench across a scarp within the Wallula Fault Zone, southeastern Washington Logs and data from the Starthistle trench across a scarp within the Wallula Fault Zone, southeastern Washington
Introduction The Wallula Fault Zone is composed of a series of northwest-trending faults and folds that coincide with a prominent magnetic anomaly that extends uninterrupted for approximately 120 kilometers within the Cascadia back arc of southeastern Washington and northeastern Oregon. It is part of the geologic structures associated with the topographic lineament known as the Olympic...
May 3, 2023 — Kīlauea summit thermal maps May 3, 2023 — Kīlauea summit thermal maps
A helicopter overflight on May 3, 2023, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea.
Using the potassium-argon laser experiment (KArLE) to date ancient, low-K chondritic meteorites Using the potassium-argon laser experiment (KArLE) to date ancient, low-K chondritic meteorites
Several laboratories have been investigating the feasibility of in situ K-Ar dating for use in future landing planetary missions. One drawback of these laboratory demonstrations is the insufficient analogy of the analyzed analog samples with expected future targets. We present the results obtained using the K-Ar laser experiment (KArLE) on two old and K-poor chondritic samples, Pułtusk...
March 14, 2023—Kīlauea summit eruption reference map March 14, 2023—Kīlauea summit eruption reference map
The Kīlauea summit eruption has been paused since Tuesday, March 7, 2023, and this reference map depicts the Halema‘uma‘u crater floor in its present noneruptive state.
March 10, 2023 — Kīlauea summit thermal map March 10, 2023 — Kīlauea summit thermal map
A helicopter overflight on March 10, 2023, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea.
Three-dimensional geologic map the southeastern Gabbs Valley geothermal area, Nevada Three-dimensional geologic map the southeastern Gabbs Valley geothermal area, Nevada
This three-dimensional (3D) geologic map displays the subsurface geology in the upper ~4 kilometers of the Earth’s crust in the southeastern Gabbs Valley geothermal area of west-central Nevada. The 3D map was constructed by integrating the results from detailed geologic mapping, 3D gravity inversion modeling, and potential-field-geophysical studies. This effort was undertaken as part of...
Geologic map and hydrogeologic investigations of the upper Santa Cruz River basin, southern Arizona Geologic map and hydrogeologic investigations of the upper Santa Cruz River basin, southern Arizona
This report includes an updated geologic map and cross sections of the upper Santa Cruz River basin, southern Arizona. The map and cross sections describe the geometry, thickness, and structure of the Miocene to Holocene units which form the main aquifers in the basin. The report also includes results of new hydrogeologic studies including (1) mapping and defining depth to bedrock based...
Colored shaded-relief bathymetric map and orthomosaic from structure-from-motion quantitative underwater imaging device with five cameras of the Lake Tahoe floor, California Colored shaded-relief bathymetric map and orthomosaic from structure-from-motion quantitative underwater imaging device with five cameras of the Lake Tahoe floor, California
This two-sheet publication displays a high-resolution colored shaded-relief bathymetric map (sheet 1) and orthomosaic (sheet 2) of part of the Lake Tahoe floor in California generated from a U.S. Geological Survey towed surface vehicle with multiple downward-looking underwater cameras. The system is named the Structure-from-Motion Quantitative Underwater Imaging Device with Five Cameras...
February 3, 2023—Kīlauea summit eruption reference map February 3, 2023—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption on February 3, 2023.
February 2, 2023 — Kīlauea summit thermal maps February 2, 2023 — Kīlauea summit thermal maps
A helicopter overflight on February 2, 2023, allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea.
Maps of elevation of top of Pierre Shale and surficial deposit thickness with hydraulic properties from borehole geophysics and aquifers tests within and near Ellsworth Air Force Base, South Dakota, 2020–21 Maps of elevation of top of Pierre Shale and surficial deposit thickness with hydraulic properties from borehole geophysics and aquifers tests within and near Ellsworth Air Force Base, South Dakota, 2020–21
The U.S. Geological Survey, in cooperation with the U.S. Air Force Civil Engineer Center, collected borehole geophysical data and completed simple aquifer tests to estimate the thickness and hydraulic properties of surficial deposits. The purpose of data collection was to create generalized contour maps of Pierre Shale elevation and surficial deposit thickness within and near Ellsworth...
January 18, 2023—Kīlauea summit eruption reference map January 18, 2023—Kīlauea summit eruption reference map
This reference map depicts the Kīlauea summit eruption on January 18, 2023.