A Meteor Impact May Have Caused a Giant Landslide in the Grand Canyon
Researchers have long puzzled over the presence of driftwood and lake sediments in Stanton’s Cave in the eastern Grand Canyon, whose mouth sits 150 feet (45.7 meters) above the river. How could the material possibly have reached that height? According to Karl Karlstrom, a geologist from the University of New Mexico, it would have had to be carried by flood levels ten times bigger than any seen in the past several thousand years. An international team of researchers proposes a surprising chain o