|Lake Terusan Kamang is at the foot of Bukit Barisan, about 14 kilometers from Bukittinggi. The limestone in Lake Tarusan Kamang is predicted to be around hundreds of centuries old, and has a mineral content of COCA 2. This lake is estimated to have existed since 70 thousand years ago so that no one who built a house on the waterline will turn into a lake. Karst hills on Lake Tarusan Kamang are much older than karst in Java. Karst in Kamang is estimated to have aged 400–300 million years ago because of the trees above it flourished.
This lake is unique because it only contains water in certain seasons. One time it looked so wide, but in an unpredictable time, this lake could turn into a stretch of green pasture.
“Many karst lakes in other areas, but only Lake Tarusan Kamang which has a direct connection with underground rivers so that a unique phenomenon appears,” said Andang Bachtiar, a geologist in Indonesia who had researched Lake Tarusan Kamang on February 23. On the other hand, Prof. Handang, who has done the same research, found that Lake Tarusan Kamang is located in the eastern Sumatra fault zone, so that it is one reason why water comes and dries. According to him, there are natural phenomena that must be excavated at Lake Tarusan Kamang, such as the presence of chunks of limestone (lime) on the banks of lakes that are around hundreds of centuries old. “It was the first time I found limestone in a lake, because limestone is usually found in coastal areas. This shows, that hundreds of centuries ago the Lake Tarusan Kamang was once an ocean”.…