• Mesa
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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.

One of the eight banners of the Qing Dynasty, built in the 43 year of Ming Wanli (1615), got its name because the flag was yellow with red edges. The yellow flag was the first of the three banners, there was no king in the flag, it was unified by the emperor, the soldiers were the emperor's own soldiers, and the members of the royal family were also selected from the upper three banners. Xianghuang Banner has nine old surnames, namely: Guarjia, Niuhulu, Borzigit, Shu Mu, Yehnala, Huifa Nara, Wulanara, Guoluo and Ilgenjelo. In addition, before entering the GATT, there are two other important tribes, one is Dong E, the other is Fucha, which is also a foreign relative. ...
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