ermen. There is also a little
granite-quarrying, and seaweed-burning employs many.

None of the islands is mountainous, and the fine scenery for which they
are famous is almost wholly coastal. In this respect each main island
has certain distinctive characteristics. Bold cliffs are found on the
south of Alderney; in Guernsey they alternate with lovely bays; Sark is
specially noted for its magnificent sea-caves, while the coast scenery
of Jersey is on the whole more gentle than the rest.

_Geology_.--Geologically, the Channel Islands are closely related to
the neighbouring mainland of Normandy. With a few exceptions, to be
noted later, all the rocks are of pre-Cambrian, perhaps in part of
Archean age. They consist of massive granites, gneisses, diorites,
porphyrites, schists and phyllites, all of which are traversed by
dykes and veins. In Jersey we find in the north-west corner a granitic
tract extending from Grosnez to St Mary and St John, beyond which it
passes into a small granulitic patch. South of the granites is a
schistose area, by St Ouen and St Lawrence, and reaching to St Aubin's
Bay. Granitic masses again appear round St Brelade's Bay. The eastern
half of the island is largely occupied by porphyrites and similar
rocks (hornstone porphyry) with rhyolites and denitrified obsidians;
some of the latter contain large spherulites with a diameter of as
much as 24 in.; these are well exposed in Bouley Bay; a complex
igneous and intrusive series of rocks lies around St Helier. In the
north-east corner of the island a conglomerate, possibly of Cambrian
age, occurs between Bouley Bay and St Catherine's Bay. Tracts of
blown-sand cover the ground for some distance north of St Clement's
Bay and again east of St Ouen's Bay. In the sea off the latter bay a
submerged forest occurs. The northern half of Guernsey is mainly
dioritic, the southern half, below St Peter, is occupied by gneisses.
Several patches of granite and granulite fringe the western coast, the
largest of these is a hornblende granite round Rocquaine Bay.
Hornblende gneiss from St Sampson and quartz diorite from Capelles,
Corvee and elsewhere are transported to England for road metal. Sark
is composed almost wholly of hornblende-schists and gneisses with
hornblendic granite at the north end of the island, in Little Sark and
in the middle of Brechou. Dykes of diabase and diorite are abundant.
Alderney con