Environment of Azerbaijan
The Caspian Sea is the largest lake on Earth by both area and volume, with a surface area of 371,000 square kilometres (143,244 mi²) and a volume of 78,200 cubic kilometres (18,761 mi³). It is a landlocked endorheic body of water and lies between Asia and Europe. It has a maximum depth of about . It is called a sea because when the Romans discovered it they tasted the water and found it to be salty. It has a salinity of approximately 1.2 percent, about a third the salinity of sea water.
Transcaspian Oblast
The Transcaspian Oblast (), or just simply Transcaspia (), was the section of Russian Empire and early Soviet Russia to the east of the Caspian Sea during the second half of the 19th century until 1924. It was bounded to the south by Iran's Khorasan Province and Afghanistan, to the north by the former Russian province of Uralsk, and to the northeast by the former Russian protectorates of Khiva and Bukhara. Area, 212,545 sq. miles. Part of Russian Turkestan, Transcaspian Oblast corresponds roughly to the territory of present-day Turkmenistan and southwestern of Kazakhstan.