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.
What Is A Lagoon? When barrier islands or reefs separate a shallow body of water from a larger body of water a lagoon is formed. Lagoons are divided into two types and they are atoll lagoons and coastal lagoons. However, lagoons can occur on gravel coastlines and mixed sand. Coastal lagoons tend to be confused for water bodies known as estuaries.