Support for a sulfuric acid origin for caves in the Guadalupe Mountains, New Mexico
— Arthur N. Palmer

Most cave specialists consider the caves in the Guadalupe Mountains of New Mexico to have formed by sulfuric acid. The evidence is weighed in this paper. Support for the hypothesis includes (1) cave patterns that indicate in situ acid generation; (2) alteration minerals that form at low pH; (3) deep rills in carbonate rock formed by local acidic drips; (4) negative δ³⁴S values in cave gypsum that contrast with positive values in nearby marine deposits; and (5) similarity to active H₂S caves
elsewhere.