• Mesa
  • Yilong 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.

Yilong County, which belongs to Nanchong City, Sichuan Province, is located in the northeast of Nanchong City, Sichuan Province. Nanchong County, 244 National Highway, 245 National Highway, 205 Provincial Highway, 206 Provincial Highway, 207 Provincial Highway, 304 Provincial Highway, Chengba Expressway and Ba-Guang-Yu Expressway run through or transit through Yilong County. Yilong County has undulating mountains, vertical and horizontal gullies, complex terrain, mild climate, four distinct seasons, sufficient heat, abundant rainfall, rain and heat in the same season, with a total area of 1791 square kilometers, including 29 towns, 7 townships and 1 street. Yilong County is an agricultural county based on planting and breeding industry, and it is the first county in the rabbit industry in the country, a key county in modern animal husbandry in the province, a key county in the construction of high-standard grain fields in the province, a demonstration county in agricultural technology popularization and fertilization in the country, and a demonstration county in soil testing and formula fertilization. It is rich in wheat, rape, rice, red potato, citrus and so on.
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