The caverns were formed when sedimentary limestone and metamorphosed limestone (marble) were dissolved by groundwater high in carbonic acid.
(The caverns; were formed; T:when sedimentary limestone and metamorphosed limestone (marble) were dissolved by groundwater high in carbonic acid) (sedimentary limestone and metamorphosed limestone; were dissolved; by groundwater high in carbonic acid)
The caverns sedimentary limestone and metamorphosed limestone
were formed were dissolved
T:when sedimentary limestone and metamorphosed limestone (marble) were dissolved by groundwater high in carbonic acid
by groundwater high in carbonic acid