Lake Tharthar, which was formed during the Holocene age covers 790 square miles.
The Tharthar depression was formed during the Holocene age, mainly by karstification, due to dissolving of gypsum rocks of the Fatha (nearby area) Formation. Tharthar covers roughly 2,050 km (790 sq mi), flows from the central and eastern parts of the Sinjar Mountains and adjacent hills, with a floor of 3 m, above the sea level. 
