The Temple Butte Formation is a Middle-to-Upper Devonian stratigraphic unit in Arizona. The formation's eastern facies in Lake Mead National Recreation Area and Parashant National Monument preserve the remains of prehistoric freshwater fishes like Bothriolepis and placoganoids. In Grand Canyon National Park marine fish left behind the fossilized remains of their bony plates.
References
Temple Butte Formation Wikipedia(Text) CC BY-SA