Building mountains in minutes requires deep rocks and a big bang.
Rings of mountainous peaks sit inside large impact craters, but scientists weren’t sure how these features formed. One explanation proposed that these mountains form from deep rocks jolted to the surface by the impact. Another theory suggested that uplift caused surface rocks to congregate in heaps around the crater.
Rocks extracted from ground zero of the impact that devastated the dinosaurs have now resolved this debate. That crater’s peak ring is made up of deep rocks, researchers report in the Nov. 18 Science.