Health Editor’s Note: The size of the crater left by this meteorite crash is astronomically huge. Perhaps this was the crash that caused the Mass Instinction? This is larger than the one in the Yucatan, right?…..Carol
Crater From Giant Meteorite Strike Might Be Hidden Under Volcanic Plateau
by Theresa Machemer/Smithsonianmag.com
Impact of a meteorite ranges from an Alabama woman’s giant bruise to the end of the dinosaurs. But one meteorite’s crater has eluded scientists for almost a century, despite the fact that it scattered glass confetti across one-tenth of the Earth’s surface. Now, experts at the Earth Observatory of Singapore have released a study, published in the Proceedings of the National Academy of Sciences, providing new evidence for the crater’s location.
The first clue to the meteorite’s impact site came from the bits of glassy debris, called tektites, that it launched into the air about 800,000 years ago. The tektites landed across Antarctica, Australia and Asia, so geologist Kerry Sieh searched for signs of the crater in satellite imagery. Sieh’s search has taken years and led him down many dead-ends, Katherine Kornei reports for the New York Times, but ultimately a lava field in southern Laos turned up promising results. There, volcanic eruptions long ago covered the land in molten rock, building a layer of igneous rock up to 1,000 feet deep, which could have easily obscured the impact crater.
The research team began by analyzing previously published chemical characteristics of tektites found in Australia and Asia, and found evidence linking …Read More: