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Geology Crib Sheet 1 - Geological Eras
Geological Ages
quaternary12,000bc - present
pleistocene600,000bc - 12,000bc
tertiary65,000,000bc - 600,000bc
pilocene10,000,000bc - 600,000bc
miocene25,000,000bc - 10,000,000bc
oligocene35,000,000bc - 25,000,000bc
eocene55 000,000bc - 35 000,000bc
paleocene65,000,000bc - 55,000,000bc
mesozoic230,000,000bc - 65,000,000bc
cretaceous135,000,000bc - 65,000,000bc
jurassic180,000,000bc - 135,000,000bc
triassic230,000,000bc - 180,000,000bc
plaezoic4,500,000,000bc - 230,000,000bc
carboniferous II300,000,000bc - 230,000,000bc
carboniferous I345,000,000bc - 300,000,000bc
devonian405,000,000bc - 345,000,000bc
silurian425 000,000bc - 405 000,000bc
ordovician500,000,000bc - 425 000,000bc
cambrian600,000,000bc - 500,000,000bc
precambrian II2,000,000,000bc - 600,000,000bc
precambrian I4,500,000,000bc - 2,000,000,000bc
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