• Mesa
  • Jiangcheng District

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.

Jiangcheng District, located in the south of Yangjiang City, is one of the municipal districts of Yangjiang City, the resident of the municipal party committee and municipal government, and the political, economic, cultural, transportation and information center of Yangjiang City. It borders Yangxi County in the west, the eastern district of Yangyang in the east, Yangchun City in the north, the South China Sea in the south, the coastal low mountains and hills in the coastal hilly area, and faces the sea along the river. Belongs to the south subtropical marine climate, the average annual temperature is 22.5℃, the average annual precipitation is 2300 mm, the whole year is basically frost-free. The forest area is 15200 hectares, with a forest coverage rate of 19.2%. Jiangcheng is a dependency of Gaoliang County in ancient times. Since Wu Sunquan bought Gaoliang County in the first year of Wei and Huang Dynasty (AD 220) (except for the 58 years of Liu Song in the Southern Dynasty), it has been administered by counties, states and counties. In the second year of the great cause of the Sui Dynasty (AD 606), Yangjiang County was set up to transform the old Tucheng and the new brick and wood city after reconstruction.
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