Transcription of The Geologic Time Scale
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The Geologic Time Scale
The Geologic time ScaleA history of the Earth How old is the Earth? billion years! 4,600,000,000 Divided into eras : Precambrian Paleozoic Mesozoic Cenozoic million years 4 x million years How long was the Paleozoic?544 MYA - 245 MYA How long was the Paleozoic?544 MYA - 245 MYA 299 million years How long was thePrecambrian?299 million years 4,056 million years299 million years Warning:Not to Scale !! To Scale ? To Scale ? How big was a a Sauroposeidon? A Scale timeline To appreciate the times involved in Earth s history, we will make two Scale timelines A set distance on the timeline represents the same amount of time ( 1 cm = 1 year) Example: If this line represents your K-12 school career, where would you be now?
How old is the Earth? • 4.6 billion years! • 4,600,000,000 • Divided into “eras”: – Precambrian – Paleozoic – Mesozoic – Cenozoic
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