Labels:bulletin board | reckoner OCR: The process of accretion had significant thermal consequences for the earth conse. quences that have forcefully directed its evolution Large bodies slamming into the planet produced immense heat in the interior melting the cosmic dust found there The resulting furnace situated some 200 to 400 kilometers underground and called magma ocean -was active for millions of years giving rise to volcanic eruptions When the earth was young heat at the surface caused by volcanism and lava flows from the interior was supplemented by the constant bombardment of huge planetesimals some of them perhaps the size of the moon or even Mars No life was possible during this period Beyond clarifying that the earth had formed through accretion the Apollo program compelled scientists to try to reconstruct the subs ...
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