Caspian Sea and a Pleistocene stage, that includes glaciation cycles and the creation of the present Volga River. During the first stage, the Tethys Sea had evolved into the Sarmatian Lake, that was created from the modern Black Sea and south Caspian, when the collision of the Arabian peninsula with Western Asia pushed up the Kopet Dag and Caucasus Mountains, setting definitive south and west boundaries to the Caspian basin. This orogeneic movement was continuous throughout the years, while Caspian was regularly disconnecting from the Black Sea. In the late Pontian, a mountain arch rose across the south basin and divided it
Clark Mountain Range Clark Mountain Range The Clark Mountain Range is located in southeastern California, north of Interstate 15 and the community of Mountain Pass. The range stretches approximately 15 miles (24 km) in a southwest-northeasterly direction, beginning in the Mojave National Preserve, and ending near Stateline Pass, about one mile (1.6 km) from the Nevada border. Clark Mountain, at 7,929 feet (2,417 m) above sea level, is the principal peak of the range. The foothills of the range are in creosote scrub and Joshua tree forests, which adjoin the dense Joshua tree woodlands atop . Higher up, pinyon pine and juniper grow