The Ustyurt or Ust-Yurt (from Kazakh: Үстірт; Uzbek: Ustyurt; Turkmen: Üstyurt; Karakalpak: Ústirt — flat hill, plateau) is a transboundary clay desert shared by Turkmenistan, Uzbekistan and Kazakhstan.^[1]

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Ustyurt Turkmen: Üstyurt Kazakh: Үстірт Uzbek: Ustyurt Karakalpak: Ústirt
Desert
Ustyurt desert road
Map of the Ustyurt Plateau
Coordinates: 43°17′N 55°33′E
Location	Kazakhstan / Turkmenistan / Uzbekistan
Area
• Total	200,000 km2 (77,000 sq mi)
Elevation	160 meters (520 ft) to 200 meters (660 ft)

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The plateau's semi-nomadic population raises sheep, goats, and camels.

The Ustyurt is located between the Dead Kultuk, Mangyshlak Peninsula and Kara-Bogaz-Gol of the Caspian Sea to the west, and the Aral Sea, Amudarya Delta and Sarygamysh Lake to the east.

It extends roughly 200,000 km² (77,000 sq mi), with an average altitude of 150 m (490 ft). Its highest point rises to 370 m (1,200 ft) in the south-west.^[2] At its northeastern edge it drops steeply to the Aral Sea and the surrounding plain.

The Ustyurt Plateau is bounded by steep cliffs called chinks nearly from everywhere. To the east, it encompasses the historical western shoreline of the Aral Sea. In the southern region, it extends to the Kunya-Darya alluvial plain and the valley of the Uzboy, while in the west, it reaches the Karynyaryk depression. To the north, it spans the Karakum sands of the North Caspian Sea and includes the Caspian Depression. ^[3] Ustyurt chinks often have multicolored layers, with colors of pale pink, blue, clear white, etc., and can form fancy landscapes.^[4]

Kazakhstan created the Ustyurt Nature Reserve (223,300 hectares) in July, 1984 in the south of Mangystausky district in Eralievsky region.^[5] It preserves rare fauna and flora such as the Ustyurt Mountain sheep and the Saiga antelope.^[6] Among its features are Sherkala Mountain and the concretions found in the Torysh ('Valley of Balls') near the town of Shetpe.

• Emba River
• Transcaspian Region
• Karakalpaks
• Khwarezm oasis region