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The Iberian System, (スペイン語:Sistema Ibérico), is one of the main systems of mountain ranges in Spain. It is a vast and complex area of mountain chains and massifs located in the central regions of the Iberian Peninsula, but reaching almost the Mediterranean coast in the Land of Valencia in the east. From the hydrographic viewpoint this system is of the highest importance in the Iberian Peninsula, for it separates the watersheds of most of the major rivers in Spain and Portugal, including the Ebro basin from the basins of the Duero, Tajo, Guadiana (Záncara-Gigüela), Júcar and Turia. There are important mining areas in some of the ranges such as Sierra Menera, Sierra de Arcos and Sierra de San Just, making the system one of the most important mining regions in Spain,〔(Recursos minerales de España - Universidad de Zaragoza )〕〔Luis Diego Arribas, ''Contemporary Art and Opencast Mining'', University of Zaragoza, 2009〕 One of the comarcas of Aragon located in the Iberian System was given the name of Cuencas Mineras since mining is the main activity in the comarca.〔(Comarcas de Aragón - Cuencas Mineras )〕 == Location and description == The Sistema Ibérico mountain range borders the Meseta Central on its western end and separates the Meseta Central from the Ebro valley and from the Mediterranean coast. This system runs northwest-southeast between the Ebro plain and the Meseta Central for over 500 km, from the La Bureba corridor in Burgos Province close to the Cordillera Cantábrica to the Mediterranean sea close to Valencia in the south and close to Tortosa and the Ebro Delta in the east. The bulk of the Sistema Ibérico is located in the southern half of Aragon. The Prebaetic System rises south of the southernmost end of the Iberian System. The geology of the Iberian System is complex, for it can hardly be defined as a homogeneous system. It is composed of a haphazard and motley series of mountain ranges, massifs, plateaus and depressions without a definite common petrologic composition and overall structure. Nummulite limestone, marble and sandstone are common throughout the area. Some of the parts of the system stand geologically isolated, interrupting the continuity of the whole, linked to the other parts through high plateaus of varying altitudes.〔(Natura Xilocae - Entre la sierra de Caldereros y el Maestrazgo de Teruel )〕 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「Sistema Ibérico」の詳細全文を読む スポンサード リンク
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