TrekGEO > Geology of Japan > Sedimentary facies > Barrier island, Sand spit, Longshore bar

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Barrier island, Sand spit, Longshore bar

Shallow marine

Overview

A sedimentary system composed of a series of sedimentary facies of a kind of bay or gulf whose entrance is half or full closed by sand spits, longshore bars and barrier islands. The facies are less subjected to the influences of waves and currents than bay and storm-dominated shelf. Tidal delta is a variety of delta.

Barrier island, Sand spit, Longshore bar

Schematic diagram of barrier island, sand spit and longshore bar. Lagoons are developed at the seashore.

Components

  • Beach ridge
  • Tidal flat
  • Lagoon
  • Flood tidal delta
  • Washover fan
  • Barrier island, Sand spit, Longshore bar
  • Fbb tidal delta
  • Foreshore
  • Upper shoreface
  • Lower shoreface
  • Inner shelf
  • Outer shelf
  • Shelf edge

Other sedimentary systems

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