Share on Facebook Share on Twitter Email
Answers.com

Phanerozoic Eon

 

Span of geologic time from 542 million years ago, the end of the Proterozoic Eon, to the present. The Phanerozoic, the eon of visible life, is divided into three major eras: the Paleozoic, Mesozoic, and Cenozoic. Although life originated in Precambrian time, it was in the Phanerozoic that many forms arose and evolved. The Earth gradually assumed its present configuration and physical features through such processes as plate tectonics, mountain building, and glaciation.

For more information on Phanerozoic Eon, visit Britannica.com.

Search unanswered questions...
Enter a question here...
Search: All sources Community Q&A Reference topics
 
 

 

Copyrights:

Britannica Concise Encyclopedia. Britannica Concise Encyclopedia. © 2006 Encyclopædia Britannica, Inc. All rights reserved.  Read more