Like the sand along our beaches, barrier islands are formed from the erosion of inland mountains and the migration of these materials (mostly quartz and feldspar) through the actions of rivers to the coasts.
(barrier islands; are formed; from the erosion of inland mountains and the migration of these materials (mostly quartz and feldspar) through the actions of rivers to the coasts)
barrier islands
are formed
from the erosion of inland mountains and the migration of these materials (mostly quartz and feldspar) through the actions of rivers to the coasts