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.
Jinxi County, which belongs to Fuzhou City, Jiangxi Province, is located in the eastern part of Jiangxi Province and the middle reaches of Fuhe River. It covers an area of 1353 square kilometers and has a population of 310000 in 2018. It has jurisdiction over 8 towns, 5 townships, 1 state-owned overseas Chinese farm, 1 provincial industrial park, and the county government is stationed in Xiugu Town. In the history of Jinxi, it was known as "Jinxi" because it produced gold and silver, and the mountain streams were as colored as gold. The county has 420000 mu of arable land and 1.32 million mu of hilly slopes suitable for forest. "six and a half mountains and two fields, half waterways and manors" constitute a beautiful landscape picture. Jinxi County is known as "Xiangshan hometown, Jiangnan Book Village, Huaxia Xiangdu". In addition to the well-preserved ancient city of Jinxi, Jinxi also has a group of Gan-style architectural ancient villages. In 2018, Jinxi County completed 9.046 billion yuan of GDP and completed its finance.