Oldonyo Lengai is an active volcanic mountain located in northern Tanzania and is part of the volcanic system of the Great Valley in Eastern Africa. It is situated at the southern end of Lake Natron and rises to an elevation of 9,442 feet.

Unlike other volcanoes, which spew silica-rich basalts, Oldonyo Lengai is the only active volcano on Earth that erupts with a carbonates are instructed into other formation and rarely reach Earth’s surface as eruptions.

The record of eruptions on the mountain dates to 1883, and flows were also recorded between 1904 anf 1910 and began between 1913 and 1915. A major eruption took place in June 1917, which resulted in volcanic ash being deposited about 48km away. Its most recent eruption was in 2007 and 2008.

“Oldoinyo Lengai” means The Mountain of God” in the Maasai language of the native people.

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