2. ranges, is the fertile Cagayan
Valley. The narrow Ilocos, or
Malayan, range, lying close
along the west coast of northern
Luzon, rises in places to
elevations above 5,000 feet
(1,500 metres) and is seldom
below 3,500 feet (1,000
metres); it is largely volcanic. In
the southwestern part of
northern Luzon are the rugged
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