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notes:history [2026/11/02 15:33] 90.248.250.121 old revision restored (2026/09/16 11:44) |
notes:history [2026/11/03 05:02] (current) 103.25.220.57 old revision restored (2026/08/03 07:51) |
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| * 2.4 bya - oxygen becomes significant component of the atmosphere | * 2.4 bya - oxygen becomes significant component of the atmosphere | ||
| * 1 bya - multicellular plants (algae) and animals | * 1 bya - multicellular plants (algae) and animals | ||
| - | * 1 bya - 800 mya - Rodinia supercontinent exists | ||
| * 770 - 750 mya - first ice age | * 770 - 750 mya - first ice age | ||
| * before 550 mya is aka the Precambrian Period or Supereon. After 550 mya is aka the Phanerozoic Eon. | * before 550 mya is aka the Precambrian Period or Supereon. After 550 mya is aka the Phanerozoic Eon. | ||
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| * Carboniferous - reptiles, amphibians, spiders, conifers, amniotic eggs (340 mya), synapsids | * Carboniferous - reptiles, amphibians, spiders, conifers, amniotic eggs (340 mya), synapsids | ||
| * Permian - more synapsids (proto-mammalian reptiles). | * Permian - more synapsids (proto-mammalian reptiles). | ||
| - | * 250 mya - Extinction event, | + | * 250 mya - Extinction event, |
| * 300 mya - 250 mya - last supercontinent Pangaea exists | * 300 mya - 250 mya - last supercontinent Pangaea exists | ||
| * **Mesozoic (Secondary) Era** : 250 - 65 mya | * **Mesozoic (Secondary) Era** : 250 - 65 mya | ||
| * Triassic - turtles, lizards, dinosaurs, mammals | * Triassic - turtles, lizards, dinosaurs, mammals | ||
| + | * Extinction event 200 mya allows dinosaurs to start to become dominant. Kills > 50 % of species. | ||
| * Jurassic - squids, frogs, birds | * Jurassic - squids, frogs, birds | ||
| * Cretaceous - more dinosaurs, flowering plants, snakes, modern fish, toothed birds | * Cretaceous - more dinosaurs, flowering plants, snakes, modern fish, toothed birds | ||