Excerpt from Barrier Islands of the Atlantic and Gulf Coasts of the United States: An Annotated Bibliography Barrier islands are usually defined as elongate, narrow land formations, composed of unconsolidated materials, and lying parallel to the shoreline. Estuaries and wetlands separate the islands from the mainland and the ocean side usually has a dynamic dune and beach system. In this work, the defini tion has been expanded to include spits and mangrove barrier islands. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.