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Short "hint"

n. - The eon following the Hadean time and coming before the Phanerozoic eon.

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Usage examples (37)
  • The first 3 eons are part of a time interval known as Precambrian time  4 billion-year interval with very few fossils.
  • The Proterozoic, Archean and Hadean are often collectively referred to as Precambrian Time, and sometimes also as the Cryptozoic.
  • (551-2500 million yrs BP) Also known as Precambrian Eukaryotic cell organisms develop.
  • Paleobotany: Sedimentary rocks show pollen in very deep, "Precambrian" strata.
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