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,
Rochechouart crater Rochechouart crater The Rochechouart crater is an impact crater. The initial crater morphology has been lost by erosion and there is no crater visible on site. The proper term to designate what remains of the Rochechouart impact crater is Rochechouart impact structure. The term “astrobleme” (wound of star in greek) introduced by R. Dietz since 1947 together with shatter cones as a symptomatic finger print for identifying an eroded impact crater on Earth, is also used to designate the Rochechouart impact structure. In 2008 the French State acknowledged the heritage value of the Rochechouart impact creating the “Réserve Naturelle Nationale