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Open-File Report 2015–1024

Prepared in cooperation with U.S. Bureau of Reclamation and National Park Service

Airborne Electromagnetic and Magnetic Survey Data of the Paradox and San Luis Valleys, Colorado

By Lyndsay B. Ball, Benjamin R. Bloss, Paul. A. Bedrosian, V.J.S. Grauch, and Bruce D. Smith

Thumbnail of and link to report PDF (5.15 MB)Abstract

In October 2011, the U.S. Geological Survey (USGS) contracted airborne magnetic and electromagnetic surveys of the Paradox and San Luis Valleys in southern Colorado, United States. These airborne geophysical surveys provide high-resolution and spatially comprehensive datasets characterizing the resistivity structure of the shallow subsurface of each survey region, accompanied by magnetic-field information over matching areas. These data were collected to provide insight into the distribution of groundwater brine in the Paradox Valley, the extent of clay aquitards in the San Luis Valley, and to improve our understanding of the geologic framework for both regions. This report describes these contracted surveys and releases digital data supplied under contract to the USGS.

First posted March 30, 2015

For additional information, contact:
Director, Crustal Geophysics and Geochemistry Science Center
U.S. Geological Survey
Box 25046, MS 964
Denver, CO 80225

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Suggested citation:

Ball, L.B., Bloss, B.R., Bedrosian, P.A., Grauch, V.J.S., and Smith, B.D., 2015, Airborne electromagnetic and magnetic survey data of the Paradox and San Luis Valleys, Colorado: U.S. Geological Survey Open-File Report 2015–1024, 19 p.,

ISSN 2331-1258 (online)




Purpose and Scope

Airborne Electromagnetic Survey

Aeromagnetic Survey

Geophysical Digital Data Overview


References Cited

Appendix 1A

Appendix 1B

Appendix 1C

Appendix 1D

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