Questions tagged [precambrian]

An informal term representing the entire period of Earth's history before the Cambrian, ~4500Ma-~550 Ma. Use with the geology tag.

Filter by
Sorted by
Tagged with
2 votes
0 answers

At what point did "Archean" go from meaning the entire Precambrian to just the middle part?

I can't find the exact date when the Archean began to mean "the middle of the Precambrian", as opposed to the beginning or the whole thing. It is some time after 1925 and before 1972. ...
Spencer's user avatar
  • 592