continent qvirila river
The Caucasus Mountains are a mountain system in ___MASK92___ between the Black Sea and the Caspian Sea in the Caucasus region . The Black Sea is a body of water between Eastern ___MASK24___ and Western ___MASK36___ , bounded by Bulgaria , Georgia , Romania , Russia , Turkey , and Ukraine . It is supplied by a number of major rivers , such as the Danube , Dnieper , Rioni , Southern Bug , and Dniester . The Black Sea has an area of ( not including the Sea of Azov ), a maximum depth of , and a volume of . It is constrained by the Pontic Mountains to the south and by the Caucasus Mountains to the east , and features a wide shelf to the northwest . The longest east - west extent is about . The Rioni or Rion River (" Rioni ", " Phasis ") is the main river of western Georgia . It originates in the Caucasus Mountains , in the region of Racha and flows west to the Black Sea , entering it north of the city of Poti ( near ancient Phasis ). The city of Kutaisi , once the ancient city of Colchis , lies on its banks . It drains the western Transcaucasus into the Black Sea while its sister , the Kura River , drains the eastern Transcaucasus into the Caspian Sea . Qvirila River is a river of Georgia . It runs for 152 kilometres ( 94 mi ) . It is a left affluent of the Rioni River .