Waves cause erosion by moving sand and debris during storms and other events, as they break higher than normal on the beach, pulling sand back into the water with them. Human interventions and major weather events such as tropical storms and hurricanes erode beaches in this way.Know More
While waves appear to be a source of powerful movement, the truth is that they really do not cause that much movement of sand. As impressive as waves appear, the water movement involved is actually quite small, and it takes place in round paths at a right angle with the ground, according to the University of Oklahoma.
In some situations, waves add to the amount of sand on a beach, as they pick up sand from the bottom of the sea and leave it behind on the beach. While some beaches get smaller over time, others get larger as a result, as the sand moves in a cyclical pattern.
Human interaction with the environment causes waves to erode beaches more than they would naturally. Building jetties, seawalls and other structures to keep the sea from working in toward shore causes water to head back to sea with more velocity than would a normal wave washing off the shore. Over time, the beach loses more sand.Learn more about Erosion & Weathering
The three major types of erosion are the transporting of soil or rocks by moving water, wind or ice. Water is the primary force behind erosion. The waves of the ocean, movement of a river and falling of rain are all ways water transports materials from one location to another.Full Answer >
Chemical erosion occurs when water transports dissolved minerals away from their source rocks. It follows chemical weathering, which results from the chemical alteration of rock by water. Chemical erosion is most common with limestone; slightly acidic rainwater dissolves calcium carbonate in the rock and redeposits it, sometimes far away, as in stalagmites and stalactites. Through oxidation, chemical erosion also occurs to some degree with unstable igneous minerals and iron-rich rocks.Full Answer >
Wind is the agent of erosion that creates sand dunes. The wind blows grains of sand into a sheltered or otherwise secure location, allowing gradual accumulation.Full Answer >
Gravity causes erosion by pulling dirt, rocks and soil downward. For example, as water mixes with dirt to form soft mud, the mud cannot support itself against the force of gravity.Full Answer >