Chicxulub crater of the resulting megatsunami represented in a New Jersey quarry, a dense marine bone bed was found on the Cretaceous–Paleogene boundary containing a mixture of dead sea animals with little or no damage from scavengers or predators. Also related to this tsunami was a dense dinosaur bone bed on the Cretaceous–Paleogene boundary found in Patagonia. Chicxulub crater The Chicxulub crater (; ) is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is located near the town of Chicxulub, after which the crater is named. It was formed by a large asteroid or comet about in diameter,
Cloud Creek crater skirt, and four through the outer rim structure. Cloud Creek crater Cloud Creek crater is an impact crater in Wyoming, United States. The crater is located in Natrona County, about 48 miles northwest of Casper, near the center of a geological feature known as the Casper Arch. The Cloud Creek structure is circular with a current diameter of about 7 km, and it is buried beneath about 1200 m of Mesozoic rocks. The age of the structure is estimated to be 190 ± 20 million years, which means that it formed as the result of an impact during the early