Researchers from the University of Kansas and the Denver Museum of Nature and Science have unearthed items in Sherman County near the Colorado border.

Mammoth bones, camel bones and possible stone tools were found at the site, said Rolfe Mandel, archaeological geologist of the Kansas Geological Survey. The site has two components, Mandel said. One of the sites, which remains unconfirmed, was tentatively dated at 12,200 years old, Mandel said.

“If we can confirm the age of the site we will have a very important find,” Mandel said. “The site could be one of the oldest sites in the midwest.”

The site, if verified, will be one of only four cites in the New World to show early indigenous peoples from this age.

Scientists will try to verify the site’s age when the researchers return to the site in early June.