Blurt!Commonplace Book

“[The flood] had to happen quickly enough that the iridium layer hadn’t been laid down yet. It also had to take place before the heavier material—the shocked minerals and glasses—had fallen out of the sky. This creates a likely window of between 15 minutes and two hours after the [Chicxulub] impact.” (John Timmer, “Scientists say they have deposits formed hours after dino-killing impact”)

Wednesday, February 19, 2020, 7:55:46pm PDT