It was discovered in sediment of the Yucatan Peninsula in Mexico. The Official name of the crater is called the Chicxulub crater, which was find by oil geologist looking for sites in 1978, but wasn’t connected to Walter evidence until 1990. The Chicxulub was the right size, age and happen at the right time from Walters collected evidence. The location was in the right location and shocked quartz (found in craters, formed by the pressure of an impact of the meteoroid and tektites (glassy fragments that form when there is a meteoroid impact), that proves and impact