Gobi Desert from , and those of the ranges from higher, though in a few cases they reach altitudes of . The elevations do not form continuous chains, but make up a congeries of short ridges and groups rising from a common base and intersected by a labyrinth of ravines, gullies, glens and basins. But the tablelands, built up of the horizontal red deposits of the Han-gai (Obruchev's Gobi formation) which are characteristic of the southern parts of eastern Mongolia, are absent here or occur only in one locality, near the Shara-muren river. They are greatly intersected by gullies or dry watercourses.
Wildlife of China go a month or longer without drinking water. A thirsty Bactrian camel can drink 135 liters (30 gallons) in only 13 minutes. They can withstand extremely hot and cold weather and have broad hooves that do not sink in desert. Bactrian camels are known as the "boats of desert" – for millennia, they were used to carry goods along the Silk Road. Wild camels are critically endangered and found in the Gobi and Taklamakan Deserts. The wild boar, from which the farm-raised pigs was domesticated some 8,000 years ago in China, remains common in the Chinese wilderness. On occasion, boars