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Wave action is the culprit
If a headland is being eroded, it will create a rocky beach
Also more powerful waves will deposit larger sediment, so some otherwise beaches will have rocks on the beach, and those rocks will be closest to the water, because heavier sediments will be deposited first, because the wave will lose energy as they slow down
beaches with just sand will have less powerful waves, so the the largest sediment that will be deposited will be grains of sand
Tidal flats have even less powerful waves, in fact there will be next to no waves there and the the largest sediment will be silt and mud
Of course, some beaches are artificial and all the sand is brought to them from elsewhere, or are naturally occurring beaches that are eroding too fast and much of that sand is also brought in from somewhere else and these beaches are often in overdeveloped areas.
Answer taken from answers.Yahoo.com User name Punk Rock and Minerals.
Wiki User
∙ 13y ago
Wiki User
∙ 6y agoSome beaches are made of sand because bigger particles are eroded by waves. Some beaches are made of pebbles because smaller particles are eroded by waves. I'm not sure about the sand one but the pebbles one I pretty sure I'm right. Hoped this helped!
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I can amplify that a little. The beach material depends on its primary source, but is always from rocks that have been eroded from the land.
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So if the rocks are principally sandstone they break back down to sand. If they are harder rocks, the beach will be boulders or shingle; if the source rocks is clay and shale the beach will be of clayey mud. Estuary beaches tend to be covered with richly-organic silt brought down by the river.
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If the coastal land is principally Chalk rich in flints (as in my own part of the world) the chalk dissolves away leaving the flints, and these become eroded down to rounded pebbles, as on Chesil Beach, on the Southern English coast.
Wiki User
∙ 15y agoSome beaches have more wind so the the tide is higher. This means that the pebbles rub together more often, so the beaches with more wind have more sand than pebbles in. :)
Wiki User
∙ 12y agoThe sand is soft and pebbles are hard.
Wiki User
∙ 11y agobecause the water moves the sand away
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True or false beaches are covered with sand?
It can be either true or false. Some beaches are covered with sand. Others are covered in different types of materials such as pebbles.
What are different types of shorelines and their characteristics?
There are many different types of shorelines. Some examples are fine-grained sand beaches, riprap structures or sheltered man-made structures. Fine-grained sand beaches are beaches with fine sand, riprap structures are rocky shorelines and man-made structures are structures like docks, built by men.
How many colors of sand are there on beaches?
There are many types of beaches. A pink sand beach is made of crushed bit of seashells.
Are there any different types of beach?
It depends what you mean by that... Many beaches have black sand and many have white... Hope this helps. Sorry if it doesn't. Also, you can have sandy beaches and stone/pebble beaches. Nude beaches and non-nude beaches.
Explain how beaches form and why all beaches are not the same?
Beaches form when tiny bits of rock that have been eroded by the action of the waves wash up on shore. They are different because they tend to be composed of different types of sand (rock bits). For example, beaches formed mainly of lava rock will have black sand, while other beaches may be white, pink, or tan.
How are winter beaches different from summer beaches?
a summer beach gains sand, and a winter beach loses sand. this is because there are more storms in winter, which takes sand away, than in the summer, when sand returns
Where did sand from beaches come from?
Sand on beaches came from RIVERS.
Why arent all beaches made up of light-colored sand?
They don't. It depends on the composition of local rock, shells and other components of the sand. Iceland and Hawai'i for example, being composed mostly of dark volcanic rocks, have black sand beaches.
Why do Caribbean beaches have black sand?
The beaches with black sand are volcanic in origin.
Why does Cuba have white sandy beaches?
Different places around the world inhabit different kinds of sand, there are several hundred different kinds of this thing that we know to be sand.
What do beaches have?
Sand
How beaches form?
beaches form with sand and water
