Surface Potassium Concentration Map

By Mineral Resources Program December 12, 2005

Calibrated airborne gamma-ray surveys provides estimate of the mean surface concentrations of potassium (K).

Public Domain.

Terrestrial radioactivity and gamma-ray exposure in the United States and Canada
Duval, J.S., Carson, J.M., Holman, P.B., and Darnley, A.G., 2005, Terrestrial radioactivity and gamma-ray exposure in the United States and Canada: U.S. Geological Survey Open-File Report 2005-1413. Available online only.