Cave Regions of the Ozarks and Black Hills

The southern half of the State of Missouri and the Black Hills of South Dakota offer exceptionally delightful regions for the study of caves or Speleology as it has been named and the sister sciences of geology and geography at the same time. In fact it is impossible to study either without giving attention to the other two and therefore instead of being separate sciences they are the three branches of a great scientific trinity.' (Excerpt from Chapter 1)