• Mesa
  • Ngamring 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.

Angren County, which belongs to Xigaze City, is located in the north-west of Xigaze, the upper reaches of the Brahmaputra River, on the middle ridge of the Gangdise Mountains, between 87.14 °- 87.75 °east longitude and 29.17 °- 31 °north latitude. It is bordered by Xietongmen County and Lazi County to the east, Cuoqin County and Saga County to the west, Nie Lamu and Dingri County to the south, and Shenza County to the north. La (Zi) Pu (Lanzhou) Highway (National Highway 219) runs through the southern part of the border. The county has an average elevation of 4513 meters, with a total area of 39600 square kilometers, accounting for 21.78% of the total area of Xigaze City. In 2010, the GNP of Angren County reached 396.12 million yuan, an increase of 13.5 percent over 2009, and the per capita GDP reached 7682 yuan, an increase of 10 percent over 2009. In 2013, Anren County had jurisdiction over two towns,
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Travel Asks In Ngamring County