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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Rockwall, Texas ： ウィキペディア英語版 Rockwall, Texas Rockwall is a city in Rockwall County, Texas, United States, and a suburb of Dallas and part of the Dallas/Fort Worth Metroplex. It is the county seat of Rockwall County,〔(【引用サイトリンク】accessdate=2011-06-07 )〕 which is the third wealthiest county in the state of Texas. The population was 37,490 at the 2010 census. The name Rockwall is derived from a naturally jointed geological formation, which has the appearance of an artificial wall.〔Monroe, J.N., 1950, ''Origin of the clastic dikes in the Rockwall area, Texas. '' Field and Laboratory. v. 18, no. 4, pp. 133-143.〕〔Ellwood, B.B., J. Payne, and G.J. Long, 1989, (''The Rockwall, Texas: A study of unusual natural magnetic effects in geoarcheological surveys produced by mineral oxidation.'' ) Geoarchaeology. v. 4, no. 2, pp. 103-118.〕 ==History== The association of Paleo-Indian artifacts with extinct Pleistocene mammal remains in various archeological sites within in the Texas Prairie-Savannah Region of eastern North Central Texas, including a site in Collin County and Clovis points recovered from the Brushy Creek Clovis Site in Hunt County, demonstrates that Rockwall region was occupied by prehistoric Native American cultures at least as far back as 13,500 to 13,000 years ago.〔Crook, W.W. III, M.D. Hughston and J.L. McCraw, 2009, ''The Brushy Creek Clovis Site (41HU74): An Early Paleoindian Occupation in Hunt County, Texas.'' The Record, Dallas Archeological Society 56(1):1-18.〕〔Crook, W. W., III, 2011, ''A Possible Association of Worked Flakes with Probosidian Bones near Lake Lavon, Collin County, Texas.'' Archeological Journal of the Texas Prairie-Savannah 1(1):4-8.〕〔Ferring, C.R., 2000, ''The Archeology and Paleoecology of the Aubrey Clovis Site (41DN79) Denton County, Texas.'' Center for Environmental Archeology, Department of Geography, University of North Texas, Denton.〕 More recently, the Rockwall region was occupied by Caddo Indians. Creek Indians moved to the area in early 19th century. In 1851, as the first Anglo-American settlers moved to the area, they started to dig wells. During the digging, they found large underground rock walls that were initially believed to be manmade. Later study of the wall-like features by geologists and archaeologists found them to be jointed, natural sandstone dikes that had intruded Cretaceous marl.〔〔 The town was established April 17, 1854 and named after these natural rock walls. While originally part of Kaufman County, in 1873, Rockwall County was formed with Rockwall being the county seat. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rockwall, Texas」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.