Mississippi has approximately 65 solution caves, not much for a whole state. Most of the the state are coastal plains, part of the East Gulf Coastal Plain, and covered by unconsolidated sediments. The western border is formed by the Mississippi River, with its alluvial plain. All those areas are not suitable for the formation of caves. Most of the caves are found along the Vicksburg Group-Forest Hill Formation, a belt of lime-bearing, Oligocene strata. Some more are in the Tennessee River Hills. There are no show caves in Mississippi, and the rare wild caves are protected and closed to the public.