Visible in this panoramic, west-southwest-looking, low-oblique photograph of eastern Oklahoma are the western Ouachita Mountains, which are composed of strongly folded and faulted sedimentary rocks (bottom left); western portions of the dissected Ozark Plateau (bottom right); and Lake of the Cherokees (bottom right). Apparent are Oklahoma City and the Canadian River as it flows generally eastward to join the Arkansas River in Robert S. Kerr Lake (barely discernible) sandwiched between the Ouachita Mountains and the Ozark Plateau. Discernible are Lake Texoma (left center) and the Arbuckle Mountains to its north—a range of low, rolling hills formed in the Precambrian era.