Barrier Islands, a coastal landform and a type of barrier system, are relatively narrow strips of sand that are parallel to the mainland coast. They usually occur in chains, consisting of anything from a few islands to more than a dozen. Excepting the tidal inlets that separate the islands, a barrier chain may extend uninterrupted for over a hundred kilometers, the longest and widest being Padre Island. The length and width of barriers and overall morphology of barrier coasts are related to parameters including tidal range, wave energy, sediment supply, sea-level trends and basement controls.
Chains of barrier islands can be found along approximately thirteen percent of the world's coastlines, some displaying different settings, suggesting that they can form and be maintained in a variety of environmental settings. Numerous theories have been given to explain their formation.
Famous quotes containing the words barrier and/or island:
“... social evils are dangerously contagious. The fixed policy of persecution and injustice against a class of women who are weak and defenseless will be necessarily hurtful to the cause of all women.”
—Fannie Barrier Williams (18551944)
“We approached the Indian Island through the narrow strait called Cook. He said, I xpect we take in some water there, river so high,never see it so high at this season. Very rough water there, but short; swamp steamboat once. Dont paddle till I tell you, then you paddle right along. It was a very short rapid. When we were in the midst of it he shouted paddle, and we shot through without taking in a drop.”
—Henry David Thoreau (18171862)