• Mesa
  • Xunyi 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.

Xunyi County, which belongs to Xianyang City, Shaanxi Province, is located in the north of Xianyang City, bordered by Yaozhou District of Tongchuan City in the east, Zhengning in Gansu Province in the north, Chunhua in the south and Linbin County in the west. The total area is 1811 square kilometers. Xunyi County was called Yi in ancient times, Qin Fengyi and Hanzhi County. It belongs to warm temperate continental climate. The terrain is high in the northeast and low in the southwest, and the mountain plateau is half and half, and the height difference is obvious. In 2018, Xunyi County had jurisdiction over 1 street and 9 towns. In 2017, Xunyi County has a total resident population of 267100, with a regional gross domestic product (GDP) of 12.202 billion yuan, of which the added value of the primary industry is 2.935 billion yuan, the secondary industry is 7.092 billion yuan, the tertiary industry is 2.175 billion yuan, and the annual per capita GDP is 45725 yuan.
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