|
Alto Toroni (Cerro Sillajguay) is a mountain in South America. It is tall and sits on the international border between Bolivia and Chile. The mountain is of volcanic nature and has had recent ground deformation and seismic activity. Heavy glacial activity has affected the mountain's shape, and some glaciation persists until today. ==Geography== Alto Toroni is the highest mountain in the Andes between 19 and 21° degrees south. The volcano is surrounded by other volcanoes and rises about above the surrounding plain.〔 The volcano has the shape of a Y with ridges pointing northeast, southeast and west. Cerro Carvinto () is a subsidiary peak southwest of the main summit.〔 Picavilque and Kimsa Chata are neighbours of this volcano.〔 The volcano is located in the Pica gap, a territory of decreased Holocene volcanism between Irruputuncu and Isluga volcanoes, on the western edge of an Oligocene or Quaternary volcanic field named Serranía Intersalar.〔 The local erosion level comprising Salar de Uyuni and Salar de Coipasa rises up to the massif that is median high and is incised by deep gorges.〔 The area is part of the summer rain zone of the Atacama; the mountain displays a highly diurnal temperature cycle and frost-thaw effects. Precipitation is assumed to be at altitude and at . Runoff runs towards the east. The area is subject to heavy insolation.〔 On the southern and eastern side, valleys and dry streams have dendritic systems, while in the north and west parallel valleys prevail. TheRio Blanco, the Ricon Tacurma, the Quebrada Seca and the Quebrada Quisimachir are the only streams carrying water at all times; other channels are active only during snowmelt and rainfall.〔 Cancosa southeast and Villa Blanca are the closest human habitations to the volcano with a few hundred indigenous inhabitants; Cancosa also has a military post. Land roads connect these to the larger town Pica thaz is five hours away.〔 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「Alto Toroni」の詳細全文を読む スポンサード リンク
|