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.
Suixi County belongs to Huaibei City, Anhui Province. It is located in the north of Anhui Province, bordering Changqiao District of Suzhou City in the east, Mengcheng County and Huaiyuan County in the south, Woyang County in the west, Yongcheng City in Henan Province in the northwest and Huaibei City in the north. Suixi County has a total area of 1987 square kilometers and a registered population of 1.1295 million (2018). It has jurisdiction over 11 townships and provincial-level Mianxi Economic Development Zone, Suixi Wuhu Modern Industrial Park, and the county government is stationed at 92 Tuohe Road, Suixi Town. Suixi County is an important county in the Central Plains Economic Zone, Huaihai Economic Zone and Xuzhou Economic Circle, known as "Jiuxiang Coal City, Central Plains Granary, Energy Capital, Canal hometown". In October 2017, it was named as the National Garden County by the Ministry of Housing and Construction. On October 22, 2018, he was selected for the integration of the primary, secondary and tertiary industries in rural areas in 2018.