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.
Linshui, known as Linzhou in ancient times, belongs to the hometown of Deng Xiaoping, the core great man of Communist Party of China's second-generation leading collective-Guang'an City, Sichuan Province, and the important highway roads of Sichuan, Shaanxi, Chongqing and Hubei. Linshui is also the nearest county seat in Sichuan Province to the main city of Chongqing and Liangjiang New area, bordering Dianjiang County, Changshou District and Yubei District of Chongqing in the east and south, and Huaying City, Qianfeng District and Dazhu County in the west and north respectively. The built-up area of Linshui County covers an area of 21.1square kilometers, with a resident population of 250000 and an urbanization rate of 41.1%. It has been successfully established as a provincial health county, a provincial civilized county, and a provincial demonstration county with beautiful environment. By 2017, the built-up area of the county will reach 30 square kilometers, with a resident population of 300000 and a urbanization rate of 48 per cent. April 2, 2019