From Marine Biodiversity Wiki
Definition of Barrier island:
A barrier islands is a ridge of sand that runs parallel to the main coast but is separated from it by a bay or lagoon.
- A detached portion of a barrier beach between two inlets.
- An offshore sand bar that rises above the mean high-water level, forming an island.
- An sandy island formed on a barrier reef. .
This is the common definition for Barrier island, other definitions can be discussed in the article
Classification of coastlines
- ↑ http://www.google.co.uk/search?hl=en&rlz=1B3GGGL_enGB245GB246&q=define%3Abarrier+island&btnG=Search&meta=