+Sedimentary rocks are formed from the accumulation and lithification of [sediment](/wiki/sediment) – fragments of pre-existing rocks, minerals, or organic matter. Over vast stretches of time, these layers are compacted and cemented by natural processes like [Compaction](/wiki/compaction) and [Cementation](/wiki/cementation), preserving clues to Earth's ancient environments.
+## See also
+- [Igneous Rock](/wiki/igneous_rock)
+- [Metamorphic Rock](/wiki/metamorphic_rock)
+- [Rock Cycle](/wiki/rock_cycle)
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