Archeozoic
or Ar·chae·o·zo·ic
[ahr-kee-uh-zoh-ik]Geology
- 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.
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- the Archeozoic division of geologic time or the rock systems formed then.
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Origin of Archeozoic
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for archeozoic
Historical Examples
But how may we separate the Proterozoic rocks from the Archeozoic?
GeologyWilliam J. Miller
During the Archeozoic, no evidence of glaciation has yet been discovered.
Climatic ChangesEllsworth Huntington
Archeozoic , the era in which the simplest forms of life originated.
Unexplored!Allen Chaffee
Even in the Archeozoic the rocks testify to a climate seemingly not greatly different from that of the average of geologic time.
Climatic ChangesEllsworth Huntington
Archeozoic rocks have been studied minutely over a very small percentage of the earth's land surface.
Climatic ChangesEllsworth Huntington
Archeozoic
- a variant spelling (esp US) of Archaeozoic
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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
Archeozoic
- See Archean.
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The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.