• Mesa
  • Pengan 

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.

Pengan County is located in the middle reaches of Jialing River, a famous historical and cultural city at the provincial level, the top ten eco-tourism demonstration cities in China, the top 50 most beautiful small cities in China, and the Qingxi River in Jialing River. it is a very beautiful landscape park city. Nanchong has established an integrated city in the same city. Pengan has a long history, outstanding people, unique location, convenient transportation from Chengdu 230 km, Chongqing 200 km, from the main city of Nanchong and Gaoping Airport only 30 minutes by car, closely integrated into the Chengdu-Chongqing "two-hour economic circle" and Nanchong "half-hour economic circle". Located in the northeast of Sichuan Province, Xiazhong County, Nanchong City, in 507 AD (the sixth year of Tianjian in the Southern Dynasty), Emperor Liang Wu named the county in memory of Sima Xiangru, which was incorporated into Pengzhou in 1371. Pengzhou changed its name to "Pengan" in 1913, with a total population of 730000.
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