the lava and pyroclastic that erupted mount. sakuajima volcano consists of medium- K series and endesite - dacite .the composition clearly differ between eruption periods.
Moving freshwater that carries sediments from land toward the ocean can be classified as estuary.
Sediment is a substance that is formed when rocks are broken down by weathering and erosion processes and then moved by the force of gravity acting on the particles or by the action of wind, water, or ice. Sediments can be classified on the basis of its size of grain, shape of grain, and composition.
Estuaries and the wetlands that surrounds them are bodies of water usually found where rivers meet the sea. An estuary is a coastal water body where freshwater from rivers and streams mixes with salt water from the ocean.
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formal region is an area inhabited by people who have one or more characteristics in common. ... Examples of formal regions are Europe, Africa, United States, and Canada. Functional Region. A functional region is an area organized to function politically, socially, and economically as a single unit.