03 Januari 2009

Lake Toba

Lake Toba is a lake with vulkanik size 100 kilometers long and 30 kilometers wide in North Sumatra, South Sumatra, Indonesia. In the middle of this lake there is an island called Pulau Samosir vulkanik.

Lake Toba long since become a key tourist destination in North Sumatra, in addition to Bukit Lawang and Nias, attract domestic and foreign tourists.

Estimated Lake Toba explosion occurred at around 73000-75000 years ago and is bursting supervolcano (super volcanoes) is new. Bill Rose and Craig Chesner from Michigan Technological University estimate that the material vulkanik a mountain dimuntahkan of 2800km3, 800km3 with ignimbrit rock and ash vulkanik that 2000km3 estimated tertiup to the west wind during the 2 sunday. Vulkanik be blown dust that the wind has spread to half the earth, from china to the south african. Letusannya going for 1 sunday and throw debunya reached 10 KM above sea level.

This incident caused the death of the bulk and in some species also followed extinction. According to some DNA evidence, is also bursting menyusutkan until the number of people around 60% of the earth's human population at that time at around 60 million people. The explosion also caused a time of ice, although experts still debate the issue.

After the explosion, the kaldera form which is then filled by water and has become now known as Lake Toba. Pressure up by magma that has not come out cause the emergence of Samosir Island.

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