2016-04-29, 08:05
Origin of Earth's oldest crystals
New research suggests that the very oldest pieces of rock on Earth -- zircon crystals -- are likely to have formed in the craters left by violent asteroid impacts that peppered our nascent planet, rather than via plate tectonics as was previously believed.
http://feeds.sciencedaily.com/~r/science...173233.htm
New research suggests that the very oldest pieces of rock on Earth -- zircon crystals -- are likely to have formed in the craters left by violent asteroid impacts that peppered our nascent planet, rather than via plate tectonics as was previously believed.
http://feeds.sciencedaily.com/~r/science...173233.htm