| ERA | MILLIONS OF YEARS | PERIOD | EPOCH | PLANT EVOLUTION | ANIMAL EVOLUTION | MAJOR GEOLGICAL EVENTS |
| Palezozic | 570 | Cambrian | Algae dominant | Triobite dominant Explosive evolution of marine life |
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| Palezozic | 520 | Ordovician | First vertebrates --fish Increase of marine invertebrates |
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| Palezozic | 450 | Silurian | First vascular plants First land plants |
Golden Age of fishes First land invertebrates |
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| Palezozic | 420 | Devonian | First seed plants Development of vascular plants: club mosses and ferns |
Amphibians diversy into many forms First land vertebrates--amphibians |
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| Palezozic | 375 | Carboniferious Pennsylvanian Mississippian |
Gymnosperms appear Widespread forests of giant club moss trees, horsetails and tree ferns -- create vast coal deposits |
Early reptiles First winged insects Increase of amphibains |
Formation of coal deposits | |
| Palezozic | 285 | Permian | Widespread extinction Decline of nonseed plants |
Widespread extinction Apperance of mammal-like reptailes Increase of reptiles and insects Decline of amphibains |
First assembly of Pangaea |
