Wave Erosion

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Earth Sciences

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Wave Erosion

Erosion By Waves-Waves shape the coast through erosion by breaking down rock and moving sand and other sediment.-Waves also erode by abrasion. For example, as a wave approaches shallow water, it picks up sediment, which eventually hits land, and the sediment wears the ground away like sandpaper wearing away wood.

How Do Waves Cause Erosion and Deposition? -Friction between waves and the ground causes the wave to slow down, and the water moves forward as the wave breaks.-This forward moving water provides the force that shapes the land along the shoreline.

Wave ErosionBy: Hope Kannning

This is what a sea cave and sea- arch look like.

Landforms Created by Wave Erosion-Over time the waves erode a hollow area in rocks called sea caves.-Eventually, waves may erode the base of a cliff so much that the rock above collapses. This result is a wave-cut cliff.-Another feature of wave erosion is a sea- arch which forms when waves erode a softer layer of rock.

A beach is an area of wave- washed sediment along a coast. This sediment is usually sand. The process of the sediment traveling with the current is called longshore drift.

A headland is a part of the shore that sticks out into the ocean. Headlands are made of harder rock that resists erosion by the waves, but over time, the waves erode the headlands and even out the shoreline.

Deposits by Waves-Deposition occurs when waves slow down, causing the water to drop its sediment.-Waves shape a coast when they deposit sediment, forming coastal features such as beaches, sandbars, barrier beaches, and spits.

Incoming waves may carry sand outshore causing sand to build up, called sandbars. A barrier beach is similar, but they are formed by storm waves. These waves will then pile up large amounts of sand that rise above sea level.


Sandbars and Barrier Beaches

A spit is a beach that projects like a finger out into the water. Spits form due to the longshore drift.



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