Cretaceous–Paleogene boundary had been that no documented crater matched the event. This was not a lethal blow to the theory; while the crater resulting from the impact would have been larger than in diameter, Earth's geological processes hide or destroy craters over time. 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, the Chicxulub impactor, striking the Earth. The date of the impact coincides precisely with the Cretaceous–Paleogene
Kauhakō Crater the surface of the lake and lifeforms, including shrimp and plankton, to disappear. Kauhakō Crater is thought to have formed around 230,000 to 300,000 years ago. Somewhere within this time period, Pu'u 'Uao, an undersea volcano located near what is now the peninsula, first erupted. After this, it continued to erupt several more times, spewing hot, fast lava. When this lava eventually cooled, the peninsula was formed, including Kauhakō Crater. Kauhakō Crater is found in the center of the Kalaupapa Peninsula. It is located inside a volcanic rim, which is roughly above sea level, making it the highest point on