Smiley_one on March 6th, 2009

Lake Toba is a so relaxing place…
The Toba caldera complex in Northern Sumatra, Indonesia consists of four overlapping volcanic craters that adjoin the Sumatran “volcanic front”. The youngest and fourth caldera is the world’s largest Quarternary caldera (100 by 30 kilometres) and intercepts the three older calderas. An estimate of 2500-3000 cubic kilometres of dense-rock [...]

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