Chicxulub impactor Chicxulub impactor The Chicxulub impactor ( ), also known as the K/Pg impactor and (more speculatively) as the Chicxulub asteroid, was an asteroid or other celestial body some in diameter which struck the Earth at the end of the Cretaceous period, approximately 66 million years ago, creating the Chicxulub crater. It impacted a few miles from the present-day town of Chicxulub in Mexico, after which the impactor and its crater are named. Because the estimated date of the object's impact and the Cretaceous–Paleogene boundary (K–Pg boundary) coincide, there is a scientific consensus that its impact was the Cretaceous–Paleogene extinction event
Ritland crater buried under a several kilometre thick mountain chain. The overlaying mountains were later eroded, and the crater was again exposed. Ritland crater The Ritland crater is an impact crater at Ritland farm in Hjelmeland municipality in eastern Rogaland county, Norway. The crater is about east of the village of Hjelmelandsvågen and about south of the Jøsenfjorden. The crater is about in diameter, and was created when a meteorite with an estimated diameter of struck here about 500–600 million years ago. The crater was later buried by sediments, of which it has been partly recovered. The structure was first discovered as