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cryowizardThe Popigai crater in Siberia, Russia is tied with Manicouagan Reservoir as the 4th largest impact crater on Earth. A large bolide impact created the 100-kilometer diameter crater about 35 million years ago during the late Eocene epoch.
[...]
The impactor in this event has been identified as either an eight-kilometer diameter chondrite asteroid, or a five-kilometer diameter stony asteroid.
The shock pressures from the impact instantaneously transformed graphite in the ground into diamonds within a 13.6 kilometer radius of ground zero. No exact count nor measure of caratage has been made available, but it is estimated that this one impact formed more diamonds than have been formed by the Earth's own processes.
http://en.wikipedia.org/wiki/Popigai_crater
[...]
The impactor in this event has been identified as either an eight-kilometer diameter chondrite asteroid, or a five-kilometer diameter stony asteroid.
The shock pressures from the impact instantaneously transformed graphite in the ground into diamonds within a 13.6 kilometer radius of ground zero. No exact count nor measure of caratage has been made available, but it is estimated that this one impact formed more diamonds than have been formed by the Earth's own processes.
http://en.wikipedia.org/wiki/Popigai_crater
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Date: 2007-10-12 08:12 pm (UTC)no subject
Date: 2007-10-12 08:13 pm (UTC)