• Mesa
  • Longgang 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.

Longgang District is an area under the jurisdiction of Huludao City, Liaoning Province, which is located on the northern seashore of Bohai Sea and on a peninsula on the coast of Liaodong Bay. The total area is 172 square kilometers and the total population is 220000. Longgang District is an industrial area dominated by smelting and shipbuilding. Railway, sea transportation and air transportation constitute a three-dimensional transportation network. Through Haichen Road, Coastal Road and Jinghu Road, it is equal to Lianshan District, and then it is connected with Beijing-Harbin Expressway and National Highway 102. the railway Hulu branch line is connected with Huludao Station of Shenshan Line; the coastal highway of Liaoning Province, with a total length of more than 1440 kilometers, passes through Longgang District, which is 30 kilometers east of Jinzhou Airport; the Huludao Port in the area can park cargo ships below 50,000 tons, which is a natural ice-free port in northern China. The coastline of the region is 54.5 kilometers long and is rich in all kinds of aquatic products.
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