2 Origins of Water 4

2 Origins of Water 4 - oceans about 100 times since the...

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Pillow Lavas 3.35 – 3.5 bya Basaltic Extrusive Rock
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Liquid Water 3.5 – 4.1 million years ago
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Origins of Earth’s Water
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Earth’s Mantle Asteroids Comets Sources
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1. Volcanic Outgassing 70% water Mantle Rocks: 0.1 – 0.5 % water Using modern eruption rates, the volume of water coming out of volcanoes could have filled the
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Unformatted text preview: oceans about 100 times since the earth cooled down 2. Asteroids 0.1 0.5 % water chondritic meteorites up to 10-20% water spherical The largest known asteroid 25 percent of the asteroid belts total mass Could contain more fresh water than earth...
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This note was uploaded on 02/10/2011 for the course SWS 2007 taught by Professor bonczek during the Fall '09 term at University of Florida.

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2 Origins of Water 4 - oceans about 100 times since the...

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