History of the Earth over eons - Mr. Richard's Blog
Dating the Earth video notes
Write at least one fact about what happened under each era and period
o Precambrian era
▪ 4.5 billion to 560 million years ago (80% of all geological time)
▪
o Paleozoic era
▪ 560 to 240 million years ago
▪
• 6 periods
o Cambrian 560 to 485 million years ago
o
o Ordovician 485 to 435 million years ago
o
o Silurian 435 to 410 million years ago
o
o Devonian 410-350 million years ago
o
o Carboniferous 350 to 290 million years ago
o
o Permian 290 to 230 million years ago
o
o Mesozoic era
▪ 230 to 65 million years ago
▪
• Triassic 230 to 192 million years ago
•
• Jurassic 192 to 35 million years ago
•
• Cretaceous 135 to 65 million years ago
•
o Cenozoic era
▪ 65 million to present
▪
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