CLICK IMAGE TO ENLARGE < Prev All Photos Next > 555 of 564 Grand Canyon, Arizona | A pink, black-tailed rattlesnake scaling the Vishnu Schist in Grand Canyon! This rattlesnake is only found in Grand Canyon. Note the vertical schistosity in the ~ 1.75 billion-year-old Vishnu Schist. Photo by Brian Gootee. Photographer: Brian Gootee Photo Date: circa 2014 Location: Photo Location Accuracy: Approximately LocatedPhoto Tags: rattlesnake, Grand Canyon, Vishnu Schist