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This is how they are formed:

A river carries, (transports) pieces of broken rock to a lake or sea.

The pieces of rock settle at the bottom, (they are deposited)

They then form into layers.

The sediments on top squish down the ones on the bottom, squeezing out all the water between the cracks.

Over time, the sediments slowly cement together.

It usually takes millions of years, but the layers eventually turn into sedimentary rocks.

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12y ago
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13y ago

it is formed by sedimentation of materials from the earths surface and also water.

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Q: A sedimentary rock is formed by what?
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