is Mount Narodnaya, approximately in elevation. Transverse faults divide the mountain chain into seven major units, each of which has its own typical pattern of mountain ridges. From north to south, these are the Pay-Khoy, Zapolyarnyy, Pripolyarnyy, Polyarnyy, Severnyy, Sredniy, Yuzhnny Ural and Mugodzhary. The average altitudes of the Urals are around 1000–1300 meters, the highest point being Narodnaya peak in the Pripolyarnyy Ural which reaches a height of . By topography and other natural features, the Urals are divided, from north to south, into the Polar (or Arctic), Nether-Polar (or Sub-Arctic), Northern, Central and Southern parts. Polar Ural The Polar Urals extend for about from Mount Konstantinov Kamen in the north to the river Khulga in the south; they have an area of about and a strongly dissected relief. The maximum height is at Mount Payer and the average height is . The mountains of the Polar Ural have exposed rock with sharp ridges, though flattened or rounded tops are also found. Nether-polar Ural The Nether-Polar Ural are higher, and up to wider than the Polar Urals. They include the highest peaks of the range: Mount Narodnaya (), Mount Karpinsky () and Manaraga (). They extend for more than south to the Shchugor. The many ridges are sawtooth shaped and dissected by river valleys. Both Polar and Nether-Polar Urals are typically Alpine; they bear traces of Pleistocene glaciation, along with permafrost and extensive modern glaciation, including 143 extant glaciers. Northern Ural The Northern Ural consist of a series of parallel ridges up to in height and longitudinal hollows. They are elongated from north to south and stretch for about from the river Usa. Most of the tops are flattened, but those of the highest mountains, such as Telposiz, and Konzhakovsky Stone, have a dissected topography. Intensive weathering has produced vast areas of eroded stone on the mountain slopes and summits of the northern areas. Middle Ural The Central Ural are the lowest part of the Ural, with smooth mountain tops, the highest mountain being (Basegi); they extend south from the river Ufa. Southern Ural The relief of the Southern Ural is more complex, with numerous valleys and parallel ridges directed south-west and meridionally. The range includes the Ilmensky Mountains separated from the main ridges by the Miass. The maximum height is (Mount Yamantau) and the width reaches . Other notable peaks lie along the Iremel mountain ridge (Bolshoy Iremel