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geo time periods

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First eon of the geological time scale. earth had a molten surface, volcanism, and asteroid impacts. named after the Greek god hades hadean
second eon of the geological time scale. methane droplets in the air surrounded earth with a global haze in this time frame. no oxygen gas on earth. oxygen was only found in compounds like water archean
third eon of the geological time scale. modern tectonic plates became active, the ancient cores of the continents moved over the globe, organisms went from single cell to more advanced cells like eukaryotes proterozoic
final eon of the geological time scale. multicellular organisms finally appear, Pangaea forms and splits, plants and animals started to live on land, it is the eon that we live in today phanerozoic
first era of the geological time scale. fish diversified and marine organisms were plentiful. time periods that formed the Appalachian mountains. paleozoic
second era of the geological time scale. known as the age of reptiles, Pangaea separated into modern continents, rocky's formed, and dinosaurs ruled the land and air mesozoic
final era of the geological time scale. known as the age of mammals. birds and mammals became abundant after the extinction of dinosaurs, most recent geological era cenozoic
first period of the geological time scale. first period in the paleozoic era, first time many invertebrates and vertebrates appear. cambrian
second period of the geological time scale. second period in the paleozoic era. known for diverse marine invertebrates, earth could have had a ring during this period. ordovician
third period of the geological time scale. third period in the paleozoic era. known for the evolution and diversification of fish, silurian
fourth period of the geological time scale. fourth period in the paleozoic era. known for being the age of fishes. land plants began to show great diversification. oxygen nears present day levels during this period devonian
fifth period of the geological time scale. fifth period in the paleozoic era. known for it vast swamp forests. amphibians were the top species during this period. carboniferous
sixth period of the geological time scale. sixth and final period of the paleozoic era. pangaea formed during this period. reptiles are now the most abundant. had a mass extinction event where 90% of marine species disappeared. permian
eighth period of the geological time scale. second period in the mesozoic time era. golden time for dinosaurs. pangaea began to break during this period. birds first appear during this period. jurassic
seventh period of the geological time scale. first period in the mesozoic time era. dinosaurs first walked on the land, first dinosaurs slew and swam as well. modern day reptiles appeared. triassic
ninth period of the geological time scale. third and final period in the mesozoic time era. known as the age of the reptiles. pangaea splits into modern continents today. dinosaurs go extinct cretaceous
tenth period of the geological time scale. first period of the Cenozoic period. significant climate change happens forming the first permanent ice sheets in the antartic, diversity of mammals and marine organisms expand, and palaeogene
eleventh period of the geological time scale. second period of the Cenozoic period. replaced vast forests with grasslands and savannahs. marine animlas, mammals, and birds all evolve. the first humans appear at the end of the period neogene
twelfth and final period of the geological time scale. third and final period of the Cenozoic period. known for having many cycles of glacial growth and retreat, extension of many large mammal and bird species, and the pread of humans. quaternary
Created by: jahmez1
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