• Mesa
  • Luqu

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.

Luqu County, which belongs to Gannan Tibetan Autonomous Prefecture of Gansu Province, is located in the southwest of Gannan Tibetan Autonomous Prefecture, the eastern edge of the Qinghai-Tibet Plateau, and the junction of Gansu, Qinghai and Sichuan provinces. The geographical coordinates are 101 °35 "36" to 102 °58 "15" east and 33 °58 "21" to 34 °48 "north latitude. As of October 2018, Luqu County has jurisdiction over 5 towns and 2 townships, with a total area of 5298.6 square kilometers and a resident population of 38000. Luqu County was officially established in June 1955. The main specialties of Luqu County are Tibetan mastiff and fern hemp pig. Zecha Stone Forest in Luqu County is not only one of the three famous tourist attractions in the county, but also a famous tourist attraction in Gannan Autonomous Prefecture and even Gansu Province. In 1998, Zecha Stone Forest was listed as a national nature reserve together with Gahai Lake.
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