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.
Cele County, which belongs to Hetian area of Xinjiang Uygur Autonomous region, is located in the southernmost part of Xinjiang, at the northern foot of Kunlun Mountains, at the southern edge of the Taklimakan Desert, bordering the Kunlun Mountains and Tibet in the south, bordering Hotan County in the southwest, Luopu County in the west, Yutian County in the east, and Shaya County in Aksu region in the north. Between latitude 35 °18 miles north 39 °30 miles, longitude 80 °03 miles east 82 °10', the length from north to south is about 468km, the width from east to west is about 35ml / 121km, and the total area is 31591.61 square kilometers. Cele County is famous for its "state of gold and jade, the warehouse of grain and cotton, the Silk Road and the hometown of melons and fruits". There are numerous historical and cultural heritages of the Han and Tang dynasties represented by the Dama Gou Buddhist ruins and the ancient city of Dan Wuyilic. 2018, strategy