sedimentary

/ˌsɛdəˈmɛntəri/
adjective
  1. Relating to or formed by the accumulation of sediment (small particles of rock, sand, or organic material) that settle in layers over time.
    • The Grand Canyon reveals millions of years of sedimentary layers.
    • Sedimentary rocks often contain fossils because they form from layers of mud and sand.
    • The geologist explained how sedimentary deposits can tell us about ancient environments.
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