• Mesa
  • Hongan County

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.

Hong'an, formerly known as Huang'an, is located at the southern foot of the Dabie Mountains in the northeast of Hubei Province, facing Wuhan to the south, Henan to the north, Macheng to the east, Huangpi and Dawu to the west. The county seat is 80 kilometers away from the provincial capital Wuhan and is about an hour's drive. It is an important part of Wuhan city circle. Hong'an County has a total land area of 1796 square kilometers and has jurisdiction over 12 townships and 396administrative villages. In 2017, Hong'an County has a total population of 700000, including 559000 in rural areas and 134600 in cities and towns. Hong'an is a typical agricultural county in mountainous areas, a key county in the new round of national poverty alleviation and development work, and a pilot county for the construction of old base areas across the country. Hong'an, with beautiful mountains and rivers and outstanding people, once nurtured the founder of Neo-Confucianism, famous philosophers Cheng Hao and Cheng Yi in the Northern Song Dynasty, and the "Tiantai Sangeng" (Geng Ying and Geng Ding) in the Ming Dynasty.
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