One complication is the occurence of karst topography (i.e. dissolution caverns which form as limestone bedrock dissolves).
(One complication; is; the occurence of karst topography (i.e. dissolution caverns) (karst topography (i.e. dissolution caverns; form; )
One complication karst topography (i.e. dissolution caverns
is form
the occurence of karst topography (i.e. dissolution caverns