• Mesa
  • Yitong Manchu Autonomous 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.

Yitong Manchu Autonomous County, which belongs to Siping City, Jilin Province, is the only Manchu Autonomous County in Jilin Province. "Yitong" is a Manchu transliteration, derived from the name of Yitong River, which means "grand, surging river". Yitong Manchu Autonomous County is located in the middle of Jilin Province, the upper reaches of Yitong River, the south of the provincial capital Changchun, Shuangyang District of Changchun City in the east, Panshi City in the southeast, Dongfeng and Dongliao counties in the south, Lishu County in the southwest, Gongzhuling City in the southwest and the suburbs of Changchun in the north. The territory is 76 kilometers from east to west, 66 kilometers from north to south, and covers an area of 2523 square kilometers. It was first promoted to Yitong Prefecture in the eighth year of Guang Xu (1882) and Yitong Zhili Prefecture in the first year of Xuantong (1909). In 1913, the state was withdrawn and the county was established. On August 30, 1988, Yitong County was abolished and established.
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Travel Asks In Yitong Manchu Autonomous County