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View Full Version : New Theory on Meteor Crater



Fraser
2005-Sep-10, 01:08 AM
SUMMARY: Scientists are in agreement that a rock from space smashed into the ground in Arizona 50,000 years ago, carving out a pit 1,250 metres (4,100 feet) across. But they're now starting to disagree on the speed the asteroid was going when it hit. One mystery that has been puzzling scientists: where is all the impact-melted rock? If it was going as much as 20 km/s (44,000 mph) as originally believed, it should have fractured into pieces which would have rained down over a larger area. But a new simulation calculates that it was going only half that speed, and probably came down as a swarm of material, not a single rock.

View full article (http://www.universetoday.com/am/publish/new_theory_meteor_crater.html)
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