&start=Press Start to begin
&part1=Rock fragments are transported by rivers towards the sea.
&part2=When rock fragments reach the sea, they are deposited on the seabed.
&part3=Over thousands of years, the rock fragments build up in layers. This is called sedimentation.
&part4=The pressure of layers above cause the fragments below to become compressed, forming sedimentary rock.
&end=Press Start to play the animation again.

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