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Pleistocene
10,000 ya
last ice age
Cretaceous-Tertiary
65 mya
dinosaur extinction
Permian-Triassic
250 mya
extinction of 96% of marine life
carboniferous
300-700 mya
proliferation of plants
devonian
460 mya
proliferation of fish
Cambrian
542 mya
explosion of life
algae, invertebrates, marine life
Pre-cambrian
542 mya to 4.6 bya
no complex life, planet was developing, atmosphere forming, earth was cooling down
eon, era, period, epoch, age
geochronological unit largest to smalles