• Mesa
  • Linxia County

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.

Linxia County, which belongs to Linxia Hui Autonomous Prefecture, Gansu Province, is located in the central part of Gansu Province, southwest of Linxia Prefecture, bordering Linxia City, Dongxiang County and Hezheng County in the east, Gannan Cooperative City and Xiahe County in the south, Xunhua County in Qinghai Province in the west, Jishishan County in the northwest, and Yongjing County in the north across the river. The county is 53.1km wide from east to west and 59.85km from north to south, with a total area of 1212.4 square kilometers. It has jurisdiction over 6 towns, 19 townships and 2 ethnic townships, with a total of 219 administrative villages, 2101 villagers' groups, 2 neighborhood committees and 11 resident groups. The total population of the county is 386900 (2011), including Han nationality, Hui nationality, Dongxiang nationality,
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