Archean Synonyms

ärkēən
The time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
(Noun)
Synonyms:
  1. Archean eon
  2. Archean aeon
  3. archeozoic
  4. archaeozoic
  5. Archeozoic eon
  6. Archaeozoic aeon
Of or relating to the earliest known rocks formed during the Precambrian Eon
(Adjective)
Synonyms:
  1. archaean

Archean Sentence Examples

  • In other words, if there was such a thing as an original crust, which may be looked upon as an open question, the Archean, as now defined, does not appear to represent it.

  • The meta-sedimentary rocks of the Archean include metamorphosed limestone, and schists which carry carbonaceous matter in the form of graphite.

  • The marble and graphite, as well as some other indirect evidence of life less susceptible of brief statement, have been thought by many geologists sufficient to warrant the inference that life existed before the close of the era when the Archean rocks were formed.

  • Most of tie Archean rocks fall into one or the other of two great series, a schistose series and a granitoid series, the latter being in large part intrusive in the former.

  • The likeness of the Archean of one part of the country to that of another is one of its striking features.

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