I recently visited a barrier island. A barrier island is created from weathering,erosion, and deposition. Let’s take a look at these three items.
To begin with keep in mind,
Weathering creates the sediment
Erosion carries the sediment
Deposition drops the sediment
Weathering of rocks is a physical or chemical change which results in the dissolving or breaking down of rock on earth
There are two major types of weathering.
Physical weathering which involves breaking rocks into smaller fragments caused by environmental factors.
There are several agents of physical weathering.
Wind
Water /waves
Glaciers
Gravity
Plants/animals
Chemical weathering involves rocks being changed into a new substance. or new minerals chemically Here is an couple of examples.
Remember,
Weathering creates the sediment
Erosion carries the sediment
Deposition drops the sediment
Erosion happens when rocks and sediment are picked up and moved to another place by water, wind , ice, even gravity.
There several agents of erosion.
Rainfall can cause erosion and wash sediment away.
Valley erosion occurs when rushing streams and rivers move rocks and sediment downstream.
Oceans are a huge force of erosion.
Wind is an agent erosion.
A dust storm can be a huge force of erosion.
Ice and glaciers erode rock.
In this picture you can see an example of deposition. The water slows down and the rock, and pebbles are deposited.
Sand dunes are created by the deposition of wind.
A river delta iscreated by the deposition of a river.
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