GOOGLE celebrating the designation of Lake Toba as a UNESCO Global Geopark. The determination occurred on August 31, 2020. Lake Toba itself has many interesting stories to tell.
The lake in North Sumatra has a legend very close to the local community. From generation to generation, the history of the formation of Lake Toba cannot be separated from the history of Toba and the goldfish.
The story begins when a young orphan named Toba is fishing in the Toba River. He also caught a big goldfish. But since the scales of this fish looked shiny and beautiful, Toba decided to take him home and take care of him. It turns out that Toba’s admiration for these golden fish scales doesn’t stop there. After being captured by the goldfish, he transforms into a beautiful woman.
Toba then fell in love upon seeing the beauty of the princess. He even decided to marry her despite the princess placing one condition, namely that Toba had to promise not to reveal her origins to anyone. Years passed and a harmonious domestic relationship was established between the two. Toba also did not reveal his wife’s identity.
But one day the mother asked their son, Samosir, to bring food to Toba in the fields. Unfortunately, halfway through the journey, Samosir got hungry and ate what was supposed to be for Toba.
After eating it, Samosir continued his journey and gave the empty lunch to his father. Enraged by Samosir’s actions, Toba suddenly became furious and shouted that Samosir was a fish.
Suddenly the sky darkened and it rained heavily for days. Thanks to this rain, a large lake appeared which we now know as Lake Toba, and the island in the center of the lake was called Samosir Island.
In science, Lake Toba is a volcanic lake. This is alluded to in the book The geology of Indonesia (1939) by the Dutch geologist Van Bemmelen. According to him, initially this ancient volcano carried out volcanic activity and a very powerful eruption occurred.
The combination of volcanic and tectonic processes in this ancient volcanic eruption caused the central part of the mountain to subside, thus forming a basin elongated from northwest to southeast.
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