Scientists have linked this fossil site to a meteor impact some 66 million years ago, which killed and buried fish, mammals, insects and a dinosaur. The Lab’s Luis Alvarez and his son Walter were the first to propose that a comet or asteroid impact was responsible for this mass extinction. https://news.berkeley.edu/2019/03/29/66-million-year-old-deathbed-linked-to-dinosaur-killing-meteor/