![]() Longshore sediment transport is responsible for the formation of many barriers along the Atlantic Coast. The process of sediment traveling in longshore currents is known as longshore sediment transport. These sediment-moving currents are known as longshore currents because they move along the coast, parallel to the shore. In their particular case, the growing Atlantic Ocean eroded sediment from the Delaware headlands, which was deposited by currents as an elongated body of sand. For example, Fenwick Island and Assateague Island developed through this process. At its western end, it is bordered by the Deltaic Coastal Marshes and Barrier Islands of the Mississippi River Delta.Barrier systems along the northeast coast of the United States formed by the erosion of sea cliffs and the accretion, or deposition, of that sediment in open water. At its east end, along the coast, this region is replaced by Big Bend Coastal Marsh. The region is also important in commercial fishing and shellfish production.Īlong most of its length, this region is bordered inland by the Gulf Coast Flatwoods, except along major rivers where it is bordered inland by the Floodplains and Low Terraces. Throughout the region there is also still significant marshland and forested wetland behind the barrier islands. There is also some public, protected land, including at Dr. However, some of the less accessible barrier islands remain undeveloped and unpopulated, and others, less densely developed. Nowadays the barrier islands been heavily developed along most of its length there is significant urbanization and local population centers, mostly for recreation and vacation homes, but with significant permanent year-round residents as well. Salt and brackish marshes supported cordgrass, saltgrass, and rushes, whereas tidal freshwater marshes, more common to the west of this region, supported arrowhead, spikerush, and bulrush. The richest coastal sites supported maritime evergreen forest, with live oak ( Quercus virginiana), Darlington oak ( Quercus hemisphaerica), and slash pine ( Pinus elliottii) and understories of sea oats. On richer sites there were maritime shrub forests, with false rosemary ( Conradina canescens), scrub oaks, and eastern baccharis ( Baccharis halimifolia). Dunes supported sea oats ( Uniola paniculata) and some seaside goldenrod ( Solidago sempervirens). ![]() This region originally had, and still has, very different cover on the different sites. In a typical winter the climate dips below freezing occasionally but freezes are short-lived. ![]() This region is frequently affected by hurricanes and other severe coastal storms. The eastern end of this region has a second drier season peaking in May. ![]() Precipitation is high year-round, but tends to peak in summer months there is a brief, slightly drier season in October. The climate is towards the mild end of a subtropical climate and moderated by the ocean. Soils vary in their water retention, but tend to be acidic. Soils are formed variously on sand and shell fragments originating along the beaches, silt and clay coming from the rivers, and muck and peat derived from local decomposition of organic matter. This region is low-lying and consists of river deltas, tidal marshes, bays, lagoons, barrier islands, dunes, and beaches. ↑About the Gulf Barrier Islands and Coastal MarshesThe Gulf Barrier Islands and Coastal Marshes is a region of Barrier Islands and Coastal Marshes along the gulf coast, extending from the Mississippi Delta, through Mississippi and Alabama's coast, and along the Florida panhandle east to Ochlockonee bay.
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