it corrodes them
In geology, the term acid rock refers to an igneous rock which is relatively high in silica.
Calcium carbonate, primarily. Recall that the conjugate acid of carbonate is bicarbonate, and the conjugate acid of bicarbonate is carbonic acid, which decomposes to water and carbon dioxide. So a...
limestone
It lands on the rocks and dissolves them.
Limestone reacts violently with acids.