Impact event Chicxulub Crater. This crater is centered on the Yucatán Peninsula of Mexico and was discovered by Tony Camargo and Glen Pentfield while working as geophysicists for the Mexican oil company PEMEX. What they reported as a circular feature later turned out to be a crater estimated to be in diameter. This convinced the vast majority of scientists that this extinction resulted from a point event that is most probably an extraterrestrial impact and not from increased volcanism and climate change (which would spread its main effect over a much longer time period). Although there is now general agreement that there
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