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Kansas Historical Marker

Big Basin

Kansas State Historical Marker
Clark County
US-283, Clark County
15 miles south of Minneola, 3 miles south of US-160 junction
      The marker stands within a geological feature known as the Big Basin, which is a sinkhole or sink about a mile in diameter and more than a hundred feet deep. Although it has the appearance of a valley, it is entirely surrounded by higher ground. Like several other smaller sinks in this section of Kansas, Big Basin was formed thousands of years ago by dissolving and collapse of massive gypsum and salt formations lying several hundred feet below the surface.