LAKE TOBA LARGEST IN SOUTHEAST ASIA
I currently want to talk about Lake Toba at located in North Sumatera Indonesian whi became one of the most beautiful spot in the world.
Lake Toba is a tekto - 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 was formed when the explosion around 73000-75000 years ago and is the eruption ( super volcano ) the most recent . Bill Rose and Craig Chesner from Michigan Technological University estimate that the total amount of material at approximately 2,800 km3 eruption -about 2,000 km3 of ignimbrite that flowed over the ground , and about 800 km3 which fell as ash , especially to the west . Pyroclastic flows from the eruption destroyed an area of 20,000 km2 , with ash deposits as thick as 600 m to the main crater.
This incident caused mass death and extinction of some species of living things . 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 argue about it . After the eruption , the caldera formed which is then filled with water and became what is now known as Lake Toba . Pressure up by magma that has not come out cause the appearance of the island.
Now Lake Toba became an attraction for its natural beauty and is a pride for Indonesia because the country into a state treasure valuable developed into a destination for the citizens of foreign countries who want menikmatin beauty of Lake Toba
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