Geological time has been separated into eons,eras, periods, and epochs.
- Devonian- Age of fish
- Cambrian -Age of trilobites
- silurian -terrestial plants
- Carboniferous-Age of amphibians,1st seed plants appered (terrestial life )
- Jurassic- Age of reptiles and gymnosperms
- Quaternary-Age of mammals(humans develop) and birds
- Miocene- Age of flowering plants
- Permian (origin of conifers).
- Ordivician (First green plants and fungi) and cambrian -Age of invertebrates
- Cretaceous- first flowering plants ,angiosperms in mid cretaceous
- Mesozoic -(Age of reptiles)
- Paleiozoic era -first vertebrate animals colonized land.
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