- noting or pertaining to the earlier half of the Precambrian Era, from about 5 billion to 2.5 billion years ago, during which the earliest datable rocks were formed and from which the oldest known fossil forms, blue-green algae and bacteria, have been recovered.
- the Archeozoic division of geologic time or the rock systems formed then.
Origin of Archeozoic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for archeozoic
But how may we separate the Proterozoic rocks from the Archeozoic?Geology
William J. Miller
During the Archeozoic, no evidence of glaciation has yet been discovered.
Archeozoic , the era in which the simplest forms of life originated.Unexplored!</p>
Even in the Archeozoic the rocks testify to a climate seemingly not greatly different from that of the average of geologic time.
Archeozoic rocks have been studied minutely over a very small percentage of the earth's land surface.
- a variant spelling (esp US) of Archaeozoic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- See Archean.
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