Notes 11-3-09

Notes 11-3-09 - G EOL 240Lxg Notes Tectonic styles on other...

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GEOL 240Lxg Notes 11-3-09 Tectonic styles on other planets The whole solar system is about 4.6 billion years old Mercury o Closest planet to the sun o A little bigger than the Moon o No evidence of plate tectonics o One plate planet because it is so small o The surface is so hot and dry it can’t subduct o 87 days to go around the sun o No atmosphere o Large metallic core Venus o Very bright o One of the brightest objects in the night sky o Earth’s “sister planet” similar size o 224 days to go around the sun o Average temperature 449 C o 81% of the Earth’s mass o 86% of the Earth’s volume o Densest atmosphere of all the terrestrial planets consisting mostly of carbon dioxide
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o C02 rich atmosphere generates a strong greenhouse effect that raises the surface temperature to over 400 C o Venus’ surface is hotter than Mercury’s o Very dry brittle features o May have been partially covered with water before it became doomed by global warming o Almost 1,000 impact craters on Venus, more or less evenly distributed
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This note was uploaded on 11/07/2009 for the course GEOL 240Lxg at USC.

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Notes 11-3-09 - G EOL 240Lxg Notes Tectonic styles on other...

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