Saturday, 6 May 2017

GEOLOGICAL TIME SCALE




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.
Present day scale is -Phanerozoic Eon, Cenozoic Era, Quaternary Period, Holocene Epoch.


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