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Arrastra Gulch, Silverton, CO 3D Data Viewer

October 21, 2022

Airborne electromagnetic and magnetotelluric geophysical surveys were conducted from 2018 to 2019 in Arrastra Gulch along the southern margins of the San Juan and Silverton calderas. This scene provides 3-D data integration combining electromagnetic data, geologic and historical mine mapping, and high-resolution drone imagery.

data viewer screenshot
Screenshot of interactive Arrastra Gulch, Silverton, CO 3D Data Viewer, available at

Data References: 

Hoogenboom, B.E., Deszcz-Pan, M., Anderson, E.D., Rodriguez, B.D., Smith, B.D., and Yager, D.B., 2022, Airborne electromagnetic and magnetic survey data, Silverton, Colorado, 2019: U.S. Geological Survey data release,

Reitman, J., Rodriguez, B.D., Brown, P.J., and Yager, D.B., 2021, Audiomagnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2019: U.S. Geological Survey data release,

Varnes, D.J., 1963, Geology and ore deposits of the South Silverton mining area, San Juan County, Colorado: U.S. Geological Survey Professional Paper,

Basemap imagery service: 

Esri, 2022, USGSTopo: Esri map service, accessed September 1, 2022, at