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Perboewatan Perboewatan (also spelled Perbuatan; apparently a Malay word of uncertain derivation) was one of the three main volcanic cones (the others being Danan and Rakata) on the island of Krakatoa (or Krakatau), in the Sunda Strait, in Indonesia. It was the lowest (400 ft) and northernmost of the cones. Perboewatan was completely destroyed during the 1883 eruption; the site in which the caldera had been is approximately deep. == Form == Taken on 27 May, 1883 by visitors to the island, Perboewatan is the only cone on Krakatoa of which quality pre-1883 photographs exist. In the photos it appears to be a low hill with a flat top. Climbers reported the erupting crater to be about across at the top, narrowing to 150 at the bottom and 500-800 feet deep. Samples were collected, revealing upon analysis a silica (SiO2) content of 65%.
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「Perboewatan」の詳細全文を読む
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