(Kelly of the Clue Crew reports from inside Carlsbad Caverns Nat'l Park, New Mexico.)  The immense chambers in the cave at Carlsbad Cavern are the result of the aggressive dissolution of limestone by this acid, H2SO4
The Moiliili Karst 
occurs in Pleistocene reef limestone located in a ...... sible at the present cave 
temperatures only by sulfuric acid ...... CARLSBAD CAVERN ... colony size and 
assessing long-term trends at Carlsbad Caverns National Park.