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Time to Solidify an Ocean of Magma The Moon melted when it formed. How long did it take.

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Presentation on theme: "Time to Solidify an Ocean of Magma The Moon melted when it formed. How long did it take."— Presentation transcript:

1 http://www.psrd.hawaii.edu/Mar09/magmaOceanSolidification.html Time to Solidify an Ocean of Magma The Moon melted when it formed. How long did it take this ocean of magma to solidify?

2 http://www.psrd.hawaii.edu/Mar09/magmaOceanSolidification.html Time to Solidify an Ocean of Magma Aftermath of the giant impact: Rapid, hot formation of the Moon. Magma ocean cooling began soon after lunar formation. Measurements of Sm-Nd and W isotopes indicate lunar formation occurred 4.517 billion years ago.

3 http://www.psrd.hawaii.edu/Mar09/magmaOceanSolidification.html Time to Solidify an Ocean of Magma Rock 72215 collected at Apollo 17 site. A single zircon in 72215 shows a range of ages. The oldest cluster at 4.417 billion years. This is 100 million years after Moon magma ocean began to crystallize.

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