Weathering Process. The weathering process occurs when rocks are exposed to the hydrosphere (water) and atmosphere (air).  These agents can change the physical and chemical characteristics of rocks.  As rocks are broken down (weathered), they can be classified as different types of sediments, which are: o boulders, cobbles, pebbles, sand, silt, clay, and colloids. See page 6 of the Earth Science Reference Tables explains the sizes of each of these sediments.
Lagoon is a water body that is formed near coastal areas. It is shallow and has a small link with sea or the ocean though it is also separated from the ocean water with reefs or a low sandbank. Arial view of a lagoon.
Barrier island contrasted with other coastal landforms. Barrier islands are a coastal landform and a type of dune system that are exceptionally flat or lumpy areas of sand which form by wave and tidal action parallel to the mainland coast.They usually occur in chains, consisting of anything from a few islands to more than a dozen.he length and width of barriers and overall morphology of barrier coasts are related to parameters including tidal range, wave energy, sediment supply, sea-level trends and basement controls. Chains of barrier islands can be found along approximately thirteen percent of the world's coastlines.