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.
Suixian is subordinate to Suizhou City, Hubei Province. Located in the north of Hubei Province, it is located at the southern foot of Tongbai Mountain, the western end of Dabie Mountain and the northeast of Dahong Mountain. It is connected with Zengdu District of Suizhou City, Guangshui City and Xinyang City of Henan Province in the east, Zaoyang and Yicheng in the west, ANLU, Jingshan, Zhongxiang and other counties and cities in the south, and Tongbai County in Henan Province in the north. Strangling "Hanxiang throat" is an "important town in northern Hubei". Suixian has a total land area of 5673 square kilometers and a total population of 1.06 million in 2017. The county government is stationed in Lishan Town. In 2016, Sui County completed a regional GDP of 19.328 billion yuan, a total industrial output value of 45.639 billion yuan, an added value of 11.522 billion yuan, a total retail sales of consumer goods of 12.924 billion yuan, and a local public budget revenue of 1,047 million yuan. twenty