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,
Peak ring (crater) develop during crater formation. The peak-ring structure of Chicxulub crater was probably formed as inward-collapsing material impacted the over-steepened central peak, to form a hydraulic jump at the location where the peak ring was located. Other theories have been formulated. Perhaps, in the case of Chicxulub crater, an over-high central peak collapsed into the peak ring. Chicxulub is Earth's only crater to have an intact peak ring structure. More ideas are available. Peak ring (crater) A peak ring crater is a type of complex crater. A central peak is not seen, instead, a roughly circular peak (possibly discontinuous) surrounds the