lake Toba

Lake Toba is a volcanic lake with a length of 100 kilometers and 30 kilometers wide, located in North Sumatra Province, Indonesia. This lake is the largest lake in Indonesia and Southeast Asia. In the middle of this lake there is a volcanic island called the island.
Lake Toba has long been an important tourist destination in North Sumatra, in addition to Bukit Lawang and Nias, attract domestic and foreign
History
It is estimated that Lake Toba explosion occurred at about 73000-75000 years ago and is a Supervolcano eruption (super volcano) the most recent. Bill Rose and Craig Chesner of Michigan Technological University estimate that volcanic materials spewed out of the mountain as much as 2800 km ³, with 800 km ³ of rock and 2,000 km ³ overlies the volcanic ash which is expected in the wind to the west for 2 weeks. Volcanic dust in the wind has spread to half the earth, from China to South Africa. The explosion occurred during a week and throw the dust up to 10 km above sea level.
This incident caused mass death and in some species also followed extinction. According to some DNA evidence, this eruption also reduced the number of people to about 60% of the total human population of the earth at that time, which is about 60 million people. The eruption also caused the ice age, although experts are still debating.
After the eruption, the caldera formed which is then filled with water and became what is now known as Lake Toba. Upward pressure by magma that has not come out cause the appearance of the island.
International multidisciplinary research team, led by Dr. Michael Petraglia, revealed in a press conference in Oxford, the United States that has found a new archaeological site that is quite spectacular by the geologist in the south and north India. On the site it is revealed how people survive, before and after volcanic eruptions (Supervolcano) in Toba 74,000 years ago, and evidence of life under a heap of ashes of Mount Toba. Though the source of the eruption within 3,000 miles, from the distribution of ashes.
For seven years, experts from Oxford University is researching ecosystem project in India, to look for evidence of life and the lives they left behind equipment in a barren desert. Area with an area of ​​thousands of hectares of this was only the savanna (grassland). While the scattered bones of animals. The team concluded, quite large area was covered with dust from this ancient volcanic eruption.
The spread of volcanic dust is very broad, found almost worldwide. Supervolcano eruption comes from an ancient, namely Mount Toba. Allegations leading to Mount Toba, because it found evidence of volcanic dust molecules form the same point in 2100. Since the caldera crater, now a lake Toba in Indonesia, up to 3000 miles, from the source of the eruption. In fact, surprisingly enough, it turns out that the spread of dust caught up to the North Pole. This is reminiscent of the experts, how powerful the super volcano Toba eruption at the time.