Stuck on a problem? Get great tutoring at an affordable price with Chegg. Click here to join and get your 1st 30 minutes Free!

Archaean

From Biology-Online Dictionary
Jump to: navigation, search

Archaean

(Science: geology) The earliest period in geological period, extending up to the Lower silurian. It includes an azoic age, previous to the appearance of life, and an eozoic age, including the earliest forms of life.

this is equivalent to the formerly accepted term azoic, and to the eozoic of Dawson.