Lake Toba has long become an important tourist destination in North Sumatra in addition to Bukit Lawang and Nias , attract domestic and foreign tourists .
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 Samosir Island .
It is estimated that Lake Toba explosion occurred at about 73000-75000 years ago and an eruption Supervolcano ( super volcano ) the most recent. Bill Rose and Craig Chesner from Michigan Technological University estimate that volcanic materials spewed out of the mountain as much as 2800 km ³ , with 800 km ³ of rock Ignimbrite and 2,000 km ³ of 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 . Explosion occurred during 1 week and throw the dust up to 10 km above sea level .
Toba catastrophe theory is a scientific theory that the volcano Toba ( Sumatra ) has erupted . According to this theory , the average world temperature dropped to 3-3.5 degrees Kelvin . This leads to a human who lived during that time died . It is estimated that only 10,000 ( or even 1,000 ) human survivors of this disaster . The possibility of this disaster also led to other extinct hominids . After these events , re- colonized the Earth , starting with Africa .
This incident caused mass death and the extinction of some species also followed . 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 still debate it .
After the eruption , the caldera formed which is then filled with water and became what is now known as Lake Toba . Pressure upward by magma that has not come out cause the emergence of Samosir Island .
International multidisciplinary team of researchers, led by Dr. Michael Petraglia, revealed in a press conference in Oxford , the United States has found a new archaeological site that is quite spectacular by geologists in southern and northern India . On the site it was revealed how people survive , before and after volcanic eruptions ( Supervolcano ) Toba 74,000 years ago , and evidence of life under Mount Toba ash heap . Though the source of the eruption within 3,000 miles , from the distribution of ashes .
Lake Toba Sumatra
For seven years , experts from the University of oxford researching ecosystem project in India , to search for evidence of life and equipment life they left behind in a barren desert . Area with thousands of hectares of this was only the savanna ( grasslands ) . While animal bones scattered . The team concluded , the large areas covered with dust turns of ancient volcanic eruptions .
The spread of volcanic dust was very spacious, is found almost all over the world. Derived from an ancient eruption Supervolcano , namely Mount Toba . Allegations leading to Mount Toba , because it found evidence of volcanic ash forms of the same molecule in 2100 . Since the caldera crater is now a lake Toba in Indonesia , 3,000 miles , from the source of the eruption . Even that is quite surprising , it turns out the spread of dust to be recorded up to the North Pole . This is reminiscent of the experts , how powerful the Toba super volcano eruption at the time.
Thank you for reading this article. Written and posted by Bambang Sunarno.
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name: Bambang Sunarno.
http://primadonablog.blogspot.com/2013/12/formation-of-lake-toba.html
DatePublished: December17, 2013 at 15.45
7MHPNPADAEFW.Tag; Formation of Lake Toba, Lake Toba, Lake Toba volcano
