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4.5 Billion Years Ago-544 Million Years Ago

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4.5 Billion Years Ago-544 Million Years Ago

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Precambrian Era - Makes up 85% of the Earth's history. Most rocks from this period have been eroded or recycled into the Earth's interior. Few fossils from this time have been preserved.

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Earth is formed

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First continental crust movements

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544 Million Years Ago-244 Million Years Ago

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544 Million Years Ago-244 Million Years Ago

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Paleozoic Era - Sea levels rose and fell multiple times during this era. Marine life during this time flourished.

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Cambrian Period - Marks the beginning of the Paleozoic Era.  Almost all important groups of marine organisms began to exist.

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Ordovician Period - Marks the earliest appearance of vertebrates, ending with the extinction of many different organisms.

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Silurian Period - Brought the emergence of land-based life plants.

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Devonian Period - Known as the "age of fishes" where fish diversified into new groups. Some of which are still present to this day.

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Carboniferous Period - Warn, moist climate conditions made lush vegetation and dense swampy forests possible.

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Permian Period - Evolution of reptiles continued

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Mesozoic Era - Made of three different periods...Triassic, Jurassic, and Cretaceous

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Triassic Period - The first dinosaurs walked the land

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Jurassic Period - Gave lush vegetation and life

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Cretaceous Period - Dinosaurs, flying reptiles, and marine reptiles went extinct

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Cenozoic Era - Known as the "age of the mammals"...we are currently in this era

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Tertiary Period - Meteorite crashed onto Earth, wiping around 75% of all the Earth's species

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Quaternary Period - Many cycles of glacial growth and retreat...we are currently in the Quaternary Period