fossils

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fossils of ammonites - sea creatures from 65million years ago

  • provide a record of organisms that lived a long time ago
  • provide evidence that animals and plants can change over a long period of time
  • a fossil is the preserved remains of a dead organism

they can be formed in several ways:

  • dead organisms can be preserved in amber (hardened tree resin)
  • casts or impressions : footprints, covered by a layer of sediments that eventually…

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