Some of the best examples of exhumed river channels occur in the Ruby Ranch Member of the Cretaceous Cedar Mountain Formation southwest of Green River, Utah. Within the Cedar Mountain Formation in this part of Utah, fluvial sandstones filling paleochannels within it are cemented by calcium carbonate.
Notable examples of submerged river channels can be seen in the Ruby Ranch Member of the Cretaceous Cedar Mountain Formation near Green River, Utah. In this area, sedimentary rocks within the formation contain sandstones that were once part of ancient channels and are now held together by calcium carbonate.