The Sinjar Mountains (چیایێ شنگالێ, جَبَل سِنْجَار, Ṭura d'Shingar), are a mountain range that runs east to west, rising above the surrounding alluvial steppe plains in northwestern Iraq to an elevation of . The highest segment of these mountains, about long, lies in the Nineveh Governorate. The western and lower segment of these mountains lies in Syria and is about long. The city of Sinjar is just south of the range. These mountains are regarded as sacred by the Yazidis. The Sinjar Mountains are a breached anticlinal structure. These mountains consist of an asymmetrical, doubly plunging anticline, which is called the "Sinjar Anticline", with a steep northern limb, gentle southern limb and a northerly vergence. The northern side of the anticline is normally faulted, which results in the repetition of the sequence of sedimentary strata exposed in it. The deeply eroded Sinjar Anticline exposes a number of sedimentary formations ranging from Late Cretaceous to Early Neogene in age. The Late Cretaceous Shiranish Formation outcrops within the middle of the Sinjar Mountains. The flanks of this mountain range consist of outward dipping strata of the Sinjar and Aliji formations (Paleocene to Early Eocene); Jaddala Formation (Middle to Late Eocene); Serikagne Formation (Early Miocene); and Jeribe Formation (Early Miocene). The Sinjar Mountains are surrounded by exposures of Middle and Late Miocene sedimentary strata The mountain is a groundwater recharge area and should have good quality water, although away from the mountain groundwater quality is poor. Quantities are sufficient for agricultural and stock use. Sinjarite, a hygroscopic calcium chloride formed as soft pink mineral, was discovered in braided wadi fill, in limestone exposures near Sinjar. The Sinjar mountains already appear in the records from second and third millennium BCE under the name Saggar, which was also applied to a deity associated with the same area. In that period, the range was viewed as a source of basalt, as well as various nuts, especially pistachios, as evidenced by texts from Mari and Mesopotamia.