• Mesa
  • Chengxi District

A mesa is an isolated, flat-topped elevation, ridge or hill, which is bounded from all sides by steep escarpments and stands distinctly above a surrounding plain. Mesas characteristically consist of flat-lying soft sedimentary rocks capped by a more resistant layer or layers of harder rock, e.g. shales overlain by sandstones. The resistant layer acts as a caprock that forms the flat summit of a mesa. The caprock can consist of either sedimentary rocks such as sandstone and limestone; dissected lava flows; or a deeply eroded duricrust. Unlike plateau, whose usage does not imply horizontal layers of bedrock, e.g. Tibetan Plateau, the term mesa applies exclusively to the landforms built of flat-lying strata. Instead, flat-topped plateaus are specifically known as tablelands.

Chengxi District, which belongs to Xining City, Qinghai Province, is located in the central and western part of Xining City, relying on the Nanchuan River to the east, facing the Xishui River to the north, and bordering Yuanzhong County and Chengnan New area to the southwest, with a total area of 82.4 square kilometers, six streets and one town, with a total population of 252700 (2014). There are 33 ethnic groups, including Han, Hui, Tibetan, Tu and Mongolian. In 2014, the gross domestic product (GDP) of Chengxi District reached 20.28 billion yuan. In the west of the city, there are Nanlianghutai ruins Park, Fahu Temple, Qinghai Provincial Museum, Xining Square, Xining people's Park and other scenic spots.
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