Sediments from Shatt al-Arab Entering Persian Gulf30.9N 47.4E
The Shatt al-Arab is a river in Southwest Asia of some 200 km (120 mi) in length, formed by the confluence of the Euphrates and the Tigris in the town of al-Qurnah in the Basra Governate of southern Iraq.
The southern end of the river constitutes the border between Iraq and Iran down to the mouth of the river as it discharges into the Persian Gulf. Here, tan sediments from the river can be seen entering the gulf, turning to green in color as they diffuse. The river varies in width from about 232 metres (761 ft) at Basra to 800 metres (2,600 ft) at its mouth.