Science glossary film: Sedimentary rock

Sedimentary rock

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Rock formed by the build-up of layers of sediment over time.

Rock formed by the build-up of layers of sediment over time. As debris accumulates, the lower levels are put under increasing pressure, and this compression gradually changes the sediment to rock. Sedimentary rocks include sandstone and limestone, and are the most common type of rock exposed at the Earth's surface.

As debris accumulates, the lower levels are put under increasing pressure, and this compression gradually changes the sediment to rock. Sedimentary rocks include sandstone and limestone, and are the most common type of rock exposed at the Earth's surface.

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