Part 5/9:
While there have likely been older impacts on Earth, many have been annihilated by erosive processes. The Yagan Craton, one of the planet's oldest and most stable continental blocks, has allowed remnants of the Yarab Buba impact to persist. In the early 2000s, geologists began to suspect the occurrence of an ancient impact event in the region through studies of shocked quartz and shatter cones. The 2020 confirmation of Yarab Buba's age at approximately 2.22 billion years places it during the early Rhaetian period, coinciding with the end of the Huronian glaciation.