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.
Huaxian, Zhiguan County, Henan Province, located in the north of Henan Province, longitude: 114.5193, latitude: 35.5754, bordering Anyang, Puyang, Hebi and Xinxiang. It is 70 kilometers north of Anyang City, 130 kilometers south of Zhengzhou City, 53 kilometers northeast of Puyang City, 70 kilometers southwest of Xinxiang City, and 25 kilometers away from Hebi New City in the northwest. The county covers an area of 1814 square kilometers, with an area of 1.9521 million mu of cultivated land. Huaxian County is the core area of grain production in the Central Plains Economic Zone, the largest grain-producing county in Henan Province, the advanced grain production unit in China, and the only advanced county in grain production in China. It is known as the "granary of northern Henan". The main tourist attractions in Huaxian County are the Sui and Tang dynasties Grand Canal, Zhangjia ruins, Wagang Village, Mingfu Temple Pagoda, Ouyang Academy, Qianchui Lake and so on. In October 2017, Huaxian County passed