Karst caves, also known as solution caves, are the most common type of cave.
Karst is a landscape typically formed by the solution of carboniferous rocks such as dolorite, limestone or gypsum by the action of rainwater, which is weakly acidic owing to the presence of carbonic acid, H2CO3. The resulting collapse of those rocks as the result of their erosion creates features such as sinkholes, caves, and underground streams and rivers.
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