• Mesa
  • Tsingyün、Qingyuan

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.

Qingyuan, also known as "Fengcheng", is a prefecture-level city in Guangdong Province, located in the middle and upper reaches of the Beijiang River. As early as the Neolithic Age, ancestors thrived in this land and created a splendid prehistoric civilization. Qingyuan is located in the north-central part of Guangdong Province, bordering Shaoguan in the northeast, Zhaoqing in the southwest and Guangzhou and Foshan in the southeast. With a total area of 19200 square kilometers, it is the largest prefecture-level city in Guangdong Province, with jurisdiction over Qingcheng, Qingxin District 2 and Fogang, Yangshan, Liannan and Lianshan counties and two county-level cities in Yingde and Lianzhou, with a total registered population of about 4.1 million in 2018. Qingyuan is connected with the Pearl River Delta region with Guangzhou as the center. In history, the southern part of Qingyuan once belonged to the jurisdiction of Guangzhou for a long time. Qingyuan culture, like Guangfu cultural circle, has a deep relationship in history, geography and ethnic groups. Yes
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