Crater formed from Earth’s extinction event produced by carbon-rich ‘C-type’ asteroid, scientists suggest | Experts studying material from event 66m years ago find signs to show how Chicxulub impact crater was formed
https://www.theguardian.com/science/article/2024/aug/15/crater-formed-from-earths-extinction-produced-by-carbon-rich-c-type-asteroid-scientists-suggest