Our Solar System is a place of violence. From tiny little dust grains bumping into one another to the unimaginable energy released through asteroidal and cometary impact. Even Earth is the collisional product of a wide range of impacts. The cratering event at Chicxulub loses it's significance when compared to the Mars-sized impactor that tilted Earth's axis and formed the Moon.
Impacts are destructive.
They turn big pieces into little ones. Their very nature tends to confuse or obliterate any record of prior events. While the end-product of these shattering collisions occasionally fall to Earth as meteorites, the likelihood of finding a study sample displaying a sequential visual record of many impacts within the meteorite was considered remote at best. Tucson, Arizona William Goldups walked his dog along the same path near his house daily. One evening, sometime in 1980 or 1981, Goldups, who lived in the Drexel Heights area of Tucson, Arizona USA, noticed a rock on the path that was darker, larger, and denser than any other rocks in the desert alluvium.