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.
Linyi County belongs to Dezhou City, Shandong Province, adjoins Shanghe County of Jinan City to the east, Yucheng City, Pingyuan County and Ling County to the west, Tuhe River and Qihe County to the south, Majiahe River and Leling City to the north, 50 kilometers to Dezhou to the west, 60 kilometers to Jinan to the south, 300 kilometers to Beijing and 200 kilometers to Tianjin to the north, 100 kilometers to Binzhou Wharf and 300 kilometers to Qingdao Wharf to the east. Located in the economic circle around the Bohai Sea, the Yellow River Delta and the "Jingjiu" economic development zone. In 2017, Linyi County, with a total area of 1016 square kilometers, has jurisdiction over eight towns, one township, three streets and one provincial economic development zone with a population of 545000. In 2017, Linyi County achieved a GDP of 28.43 billion yuan. In 2016, the work of removing counties and establishing cities in Linyi County was carried out in an all-round way. December 29, 2018