Big Basin
Big Basin Prairie Preserve
Useful Information
History
Description
Big Basin and Little Basin are the two best known sinkholes in the
Red Hills, a karst area at the southern border of Kansas.
Big Basin is about 1,600m in diameter and 30m deep, Little Basin is about 256m
diameter and 10m deep.
Both are dolines, formed by underground solution and the collapse of the
overlaying rocks.
There are salt and gypsum beds more than 100m deep below the surface, which are
continually soluted by the groundwater.
Doline
