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Archaean synonyms

är-kē'ən

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archean (related)
Designating or of the geologic eon characterized by the development of the first igneous and metamorphic rocks and the first marine microorganisms; Precambrian, esp. early Precambrian
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Archaean Sentence Examples

  • They are known to be pre-Jurassic, but whether they are Palaeozoic or Archaean is uncertain.

  • On the mainland, the north and east shores are of gneisses and granites of archaean age, with a broken and hilly surface rising in places to 600 ft.

  • The outcrops of these rocks succeed each other in order of age in roughly concentric belts, with the Archaean mass of the island of Anglesey as a centre, but the arrangement in detail is much disturbed and often very irregular.

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