Various theories have been proposed for this phenomenon, the most likely of which is the increase in ground pressure due to the presence of hydrocarbon gases.
Cheshmeh Mishi (Mishi Spring) is the name of one of the famous springs of Kohgiluyeh and Boyer-Ahmad Province, which is located 7 km away from Sisakht city.
Tang-e Boraq (Boraq Gorge) is another erosive gorge in the north of Fars province, which is located about 160 km from Shiraz and near a village of the same name.