Flint Hills - John Morrison

Flint Hills

The Kansas Flint Hills, formed by the erosion of Permian-age limestones and shales, extend from Marshall County, in the north, to Cowley County, in the south, and are known as the Osage Hills in Oklahoma. Named for the embedded bands of chert, or flint, the Flint Hills region is one of the last great preserves of tallgrass prairie in the country. —Kansas Geological Survey

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Twilight Prairie Fire

Twilight Prairie Fire

During daylight hours, white plumes of smoke rise skyward from the burning pastures. When night falls, the white smoke takes on the orange color of the burning grass. A few miles south of Cottonwood Falls, in Chase County. April 12, 2006.