Scene along the Bighorn River at the north end of the Wind River Canyon in Washakie County, Wyoming. The Bighorn and Wind rivers meet and exchange waters in the canyon, almost like relay runners exchanging batons. The red rocks, which date to the Triassic Period about 200 million years ago, are called the "Chugwater Formation." It consists of red shale and siltstone containing thin gypsum partings near its base