The geological structure of this parish is similar to that of St.
Clear. Its western part rests on granite, forming high and barren
hills, the sides and summits of which are covered with boulders and
tors. Of the latter the most interesting is the celebrated Cheese
Wring. Its eastern part consists of massive and schistose varieties of
felspar rocks and green stone.
LUDGVEN, or LUDGEAN.