182 ELEMENTARY GEOLOGY 
Upon most sandy sea-coasts, the wind finds it pos- 
sible to move the sand from the beach and drive it 
inland, forming hummocky hills or sand dunes (Figs. 61 
and 62). In this manner, by the aid of the waves, 
the wind builds many islands near the coast. The 
process 1s simply this: first the 
water throws up a bar to the 
height reached by the greatest 
storm wave, and then the wind 
builds these higher still (Fig. 62). 
The sandy islands from Sandy 
Hook southwards, and some of 
those on the New England coast, 
have been formed in this way. 
In New England this is particu- 
larly the case along the shores of 
Long Island and Cape Cod. 
One of the most interesting 
eases of the formation of islands 
Fic. 60. 
Seite by accumulation of blown sand, is 
Wang orvoess "found in the Bermudas. Here 
for countless ages corals have lived and died furnish- 
ing their limy shells to the waves, which have ground 
them into bits on the beach. Then the wind has 
gathered these fragments into hills above the reach 
of the waves, and nearly all of the Bermudas are 
built of this coral sand (Figs. 62 and 63). 
