• Mesa
  • Puyang City

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.

Puyang City, a prefecture-level city in Henan Province, is located in the northeast of Henan Province, the lower reaches of the Yellow River, the junction of Hebei, Shandong and Henan provinces, Jining City and Heze City in Shandong Province in the east and south, Liaocheng City and Tai'an City in Shandong Province in the northeast, Handan City in Hebei Province in the north, Anyang City in Henan Province in the west, and Xinxiang City in Henan Province in the southwest. Puyang City is a national historical and cultural city with a total area of 4188 square kilometers, with jurisdiction over Puyang County, Qingfeng County, Nanle County, Fan County, Taiqian County and Hualong District. It has a national economic development zone, an industrial park and a demonstration area for the integration of urban and rural areas. it is an important national commodity grain production base and one of the main grain, cotton and oil producing areas in Henan Province.
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