lec 3 - Fall 08 GE105 Continents Adrift Fall 08 GE105...

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Unformatted text preview: Fall 08 GE105 Continents Adrift Fall 08 GE105 Continents Adrift 11 Meteorites Meteorites have the same ages: 4.55 +/- 0.05 billion years They suggest that the age of the solar system (including planets) is about 4.5 billion years , (2) that solar system formation took less than a few tens of million of years, and (3) meteorites provide us constraints on the chemical composition of Earth. Fall 08 GE105 Continents Adrift Fall 08 GE105 Continents Adrift 22 Element abundance 101 10 8 10 6 10 4 10 2 1 Observations of solar composition and meteorites Fall 08 GE105 Continents Adrift Fall 08 GE105 Continents Adrift 33 The magma ocean in the Hadean eon Immediately after accretion the Earths outermost shell (1000 km) was entirely molten Fall 08 GE105 Continents Adrift Fall 08 GE105 Continents Adrift 44 Heat and the shaping of Earth Why is the Earth a sphere? This view of the Earth rising over the Moon's horizon was taken during the Apollo 11 mission in 1969. The lunar terrain pictured is in the area of Smyth's Sea on the nearside.is in the area of Smyth's Sea on the nearside....
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lec 3 - Fall 08 GE105 Continents Adrift Fall 08 GE105...

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