(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
... Carlsbad Cavern includes a large 
cave chamber, (The Big Room), a natural limestone chamber almost 4,000 feet (
1,220 m)... [DOC] [TLE] Geology of Carlsbad Cavern and other caves in the Guadalupe ... [PAR] J. Michael Kelly, 1992-1997, Roswell ...