This article from the Aspen Times, tells the story about an amazing find in North America.

more than 500 bones representing eight to 10 American mastodons, four Colombian mammoths, four Ice Age bison, two deer, Colorado’s first-ever Jefferson’s ground sloth, several smaller animal species and hundreds of pounds of plant material.

Apparently this was a surprising location to find such a large amount of fossils, because where it was found is sitting at 8,874 feet in elevation, an altitude that had been mostly absent from the fossil record.