They form where weakly acidic waters dissolve the carbonate rock, often leading to underground networks of caverns forming.
(They; form; where weakly acidic waters dissolve the carbonate rock, often leading to underground networks of caverns) (weakly acidic waters; dissolve; the carbonate rock)
They weakly acidic waters
form dissolve
where weakly acidic waters dissolve the carbonate rock, often leading to underground networks of caverns
the carbonate rock