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Rasac
Rasac (hispanicized spelling) or Rasaq (Quechua for toad) is a mountain of the Waywash mountain range in west central Peru, part of the Andes. It has a summit elevation of 〔Page 83 of John Biggar - ''The Andes - A guide for Climbers (2nd edition)'' - Andes - 1999〕 (other sources: 6,040 m/19,816 ft) high. Rasac is a long, relatively squat mountain on the western edge of the Waywash range, across the glacier from the tallest peak in the range, Yerupaja. Although it is a 6,000 metre mountain, Rasac´s broad profile is dwarfed by Yerupaja. ==Geology== As the rest of the Waywash, Rasac is made mainly of limestone, interbedded with sandstone and shale. These sediments were originally laid down on the ocean floor and have been pushed up and folded due to the convergence started about 90 million years ago when the Nazca oceanic plate started to slide under the South American continental plate.〔(【引用サイトリンク】title=Geology of Cordillera Huayhuash )〕 The limestone has a coarse, sharp texture and is light to dark grey in colour (although sometimes a slight bluish tint can occur). Marine fossils (bivalves and ammonites) may be found within some of the limestone beds. Some volcanic activity has also influenced the geology of the Huayhuash.
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「Rasac」の詳細全文を読む
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