This age is determined through various methods, including:
* Radiometric dating: Analyzing the decay of radioactive isotopes in the rocks surrounding the crater.
* Impact ejecta: Studying the layer of impact debris found globally, which is dated to the same period.
* Fossil record: The mass extinction event that marked the end of the Cretaceous period, believed to be caused by the Chicxulub impact, is precisely dated to 66 million years ago.
It's important to note that the Chicxulub crater is not referred to as "Mexico Crater," but rather as "Chicxulub Crater" after the nearby town of Chicxulub.