• Mesa
  • Jiang'an 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.

Jiang'an County, which belongs to Yibin City, Sichuan Province, is located on the southern edge of Sichuan, along the Yangtze River, east of Yibin, and at the turn of the three cities (Yibin, Luzhou and Zigong). The ground spans latitude 28 °22 "20"-28 °56 "45" north and longitude 104 °57 °40 "- 105 °14" 33 "east. In 2010, Jiang'an County has jurisdiction over 14 towns. The county covers an area of 912sq km, with a total population of 555995. The people's Government of the county is stationed on Zhudu Avenue, Jiangan Town. Jiang'an County is rich in rice, wheat, sweet potato, sorghum, rape, beans and other crops, is the national summer orange base county, commodity grain base county, sericulture production county, lean pig base county. Jiang'an County is known as "the ancient capital of China's Orange Sea River and Bamboo Sea" with a long history and profound culture. Jiang'an County has Xijiashan Classical Manor and National Academy of Drama.
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