Minggu, 25 Januari 2009

Vacation in North Sumatera



The Toba lake
The Toba lake was a volcanic lake of 100km x 30km in North Sumatra, Sumatra, Indonesia. In the middle was gotten a volcanic island was named the Samosir Island. The Toba lake had since long before become the area of the aim of the important tour in North Sumatra apart from the Lawang Hill and Nias, attracted domestic tourists and foreign countries. Estimated the Toba Lake happened during the explosion around 73,000-75,000 last year and was the eruption supervolcano (the volcano super) that was newest. Bill Rose and Craig Chesner from Michigan Technological University estimated that volcanic materials that were spewed out the mountain totalling 2800km3, with 800km3 the rock ignimbrit and 2000km3 volcanic ash that was estimated was blown the wind to the west for 2 weeks. This incident caused the mass death and to several species also was followed by the extinction. According to some DNA proof, this eruption also menyusutkan the amount of humankind until around thousands then. After this eruption, was formed the caldera that afterwards was filled by water and to that now is known as the Toba Lake. The pressure above by by magma that did not yet go out caused the Samosir Island emergence.

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