GEOLOGY

Detailed explanation-1: -Lagoons sheltered by sandbars or barrier islands are called coastal lagoons. Coastal lagoons form along coastal plains-flat or gently sloping landscapes. They form in areas with small tidal ranges.

Detailed explanation-2: -Barrier islands are called “barrier islands” because they create a barrier between the mainland and the ocean. They shelter and protect the mainland from the powerful forces of wind, waves, tides, currents and the ravages of storms and hurricanes.

Detailed explanation-3: -They are generally separated from the mainland by tidal creeks, bays, and lagoons. Beaches and sand dune systems form on the side of the island facing the ocean; the side facing the shore often contains marshes, tidal flats, and maritime forests.

Detailed explanation-4: -Beaches and dunes often form a sand and gravel landform, or barrier, between the ocean and a coastal wetland. This landform is called a coastal barrier. Commonly referred to as a barrier beach or barrier island, coastal barriers take on many forms.

Detailed explanation-5: -Barrier islands tend to form primarily along microtidal coasts, where they tend to be well developed and nearly continuous. They are less frequently formed in mesotidal coasts, where they are typically short with tidal inlets common. Barrier islands are very rare along macrotidal coasts.