Sunday, August 29, 2010
Multiple Asteroid Impact Theory Advanced
The end-Cretaceous mass extinction has been attributed by most to a single asteroid impact at Chicxulub on the Yucatán Peninsula, Mexico. The discovery of a second smaller crater with a similar age at Boltysh in the Ukraine has raised the possibility that a shower of asteroids or comets impacted Earth close to the Cretaceous-Paleogene (K-Pg) boundary, according to a new study lead by David Jolly from the Department of Geology & Petroleum Geology, Kings's College, Aberdeen University. More form the BBC and UPI. The multiple impact theory has been raised a number of times in this decade.