2 Origins of Water 3 - of the Cambrian period approximately...

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Accepted Age of the Earth: 4.6 billion years Accretion of materials from formation of the solar system Molten Surface 8000 o F
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Precambian 4.5 Bya to 570 Mya Paleozoic 570 Mya to 245 Mya (Multicellular explosion) Mesozoic 245 Mya to 65 Mya (Age of the reptiles) Cenozoic 65 Mya to present Geologic Time Line (Earth formation, cooling, oceans, primitive life, atmosphere)
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Precambrian Cenozoic Era Paleozoic Mesozoic - 4.6 bya Human civilization 570 mya 65 mya Time Scale Approximately 90% of Earth’s history Precambrian encompasses the time from Earth's formation, approximately 4.5 billion years ago, until the start
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Unformatted text preview: of the Cambrian period approximately 570 million years ago (mya). N 2 (nitrogen) CO 2 (carbon dioxide) NH 3 (ammonia) ? CH 4 (methane) ? Chlorine, sulfur, hydrogen H 2 O (water vapor) Early Precambrian Hadean Time Cooling and condensation of water from the atmosphere Liquid water at the surface When? Zircon Crystals Earliest Evidence of liquid Water on Earth ~ 4.1 bya Earth’s oldest terrestrial materials Western Australia, 2001 Water and the Rocks Minerals indicate Interaction with water Western Greenland 3.8 billion years old...
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