File:Prr-1.gif
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Fig. 14. Mechanisms for cave enlargement. (1) Conversion of limestone to gypsum crust by sulphuric acid, dissolved by the cave stream and by infiltrating freshwater. (2) Drips of sulphuric acid from the gypsum wall crust and snottites corrode limestone below. Microbial activity enhances the oxidation reactions that produce the acid. (3) Sulphuric acid seeps through the gypsum crust and dissolves the limestone at the base. Solutional rills are common (after Palmer and Palmer, 1998).
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current | 16:07, 1 May 2009 | 459 × 536 (36 KB) | Robertsp (talk | contribs) | Fig. 14. Mechanisms for cave enlargement. (1) Conversion of limestone to gypsum crust by sulphuric acid, dissolved by the cave stream and by infiltrating freshwater. (2) Drips of sulphuric acid from the gypsum wall crust and snottites corrode limestone be |
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