• Mesa
  • Chengbei 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.

Chengbei District, which belongs to Xining City, Qinghai Province, is located in the northwest of Xining City, bordering east and east, Huangzhong county in the west, Huangshui river in the south and Datong Hui Tu Autonomous County and Huzhu Tu Autonomous County in the north. It is about 23 kilometers from east to west and about 5 miles from north to south, with a total area of 137.7 square kilometers. In 2010, the region has a resident population of 299002, including 30 ethnic groups such as Han and Hui. In 2013, Chengbei District had jurisdiction over 3 streets and 2 towns, and the district government was stationed in Chaoyang West Road, Chaoyang Street; the district's GDP was 19.318 billion yuan, an increase of 14.2% over the same period in 2012.
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