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
Black Sea turquoise), Middle Persian / ("blue"), and New Persian ("blue"), as well as Ossetic (“dark gray"). The ancient Greeks, most likely those living to the north of the Black Sea, subsequently adopted the name and altered it to . Thereafter, Greek tradition refers to the Black Sea as the "Inhospitable Sea", , which is first attested in Pindar (). The name was considered to be "ominous" and was later changed into the euphemistic name "Hospitable sea", , which was also for the first time attested in Pindar. This became the commonly used designation for the sea in Greek. In contexts related