Archean

Archean What animals or life forms lived during the Archean eon time?
What animals or life forms lived during the Archean eon time?
Simple and reef-building algae. Heyday of graptolites. Abundance of trilobites, brachiopods, gastropods, crinoids, corals, echinoids, bryozoans and ce...
Archean What animals and plants existed during the Archean Era?
What animals and plants existed during the Archean Era?
Abundance of trilobites, brachiopods, gastropods, crinoids, corals, echinoids, bryozoans and cephalopods. First green and red algae. Trilobites abound...