Largest 'Megaripples' on Earth From Dinosaur-Killing Asteroid is Buried Deep Under Louisiana
A peculiar geologic finding from the dinosaur-killing asteroid that hit Earth 66 million years ago indicates that 52-foot-tall 'megaripples' hides deep under Louisiana, and the largest known megaripples on Earth. These megaripples are about 5,000 feet (1,500 m) under the Iatt Lake area, in north central Louisiana, as tall as a five-story building. Their formation was dated back to the Cretaceous period when that part of the state was underwater. Researchers say that its size and orientation was formed after the occurrence of the giant Chicxulub asteroid that struck the Yucatán Peninsula and ...