Devils Tower

Devils Tower (Lakota: Matȟó Thípila ("Bear Lodge") or Ptehé Ǧí ("Brown Buffalo Horn") (Arapaho: Wox Niiinon ) is an igneous intrusion or laccolith in the Black Hills near Hulett and Sundance in Crook County, northeastern Wyoming, above the Belle Fourche River. It rises dramatically 1,267 feet (386 m) above the surrounding terrain and the summit is 5,114 feet (1,559 m) above sea level.

• http://en.wikipedia.org/wiki/Devils Tower
• Page 214 - Dicka, A. B., 2012, 101 American Geo-sites you've gotta see: Mountain Press Publishing Co., 250p.