County: Clark

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Photographer: John Charlton/KGS

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Short description: Red Hills in Clark County. Soils, shales, siltstones, and sandstones in the rugged Red Hills region get their color from iron oxide (rust), which turns bright red when exposed to oxygen. The region's butte-and-mesa topography was influenced by layers of gypsum, and the Red Hills are sometimes called the Gyp or Gypsum Hills.

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Credit: This photo may be reproduced for non-commercial and educational purposes. When using this photo in a publication, website, or presentation, please credit Kansas Geological Survey. For information about use for commercial purposes, please contact the KGS editor.