Mount Tongkoko
Encyclopedia
Mount Tongkoko or Mount Tangkoko is a stratovolcano
Stratovolcano
A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...

 in the north of Sulawesi
Sulawesi
Sulawesi is one of the four larger Sunda Islands of Indonesia and is situated between Borneo and the Maluku Islands. In Indonesia, only Sumatra, Borneo, and Papua are larger in territory, and only Java and Sumatra have larger Indonesian populations.- Etymology :The Portuguese were the first to...

, Indonesia
Indonesia
Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

. Its summit has an elongated deep crater
Volcanic crater
A volcanic crater is a circular depression in the ground caused by volcanic activity. It is typically a basin, circular in form within which occurs a vent from which magma erupts as gases, lava, and ejecta. A crater can be of large dimensions, and sometimes of great depth...

. On the east flank there is a flat lava dome
Lava dome
|250px|thumb|right|Image of the [[rhyolitic]] lava dome of [[Chaitén Volcano]] during its 2008–2009 eruption.In volcanology, a lava dome is a roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano...

 Batu Angus. Historical records only show eruptions in the nineteenth century.

The Tangkoko Nature Reserve is a refuge for such species as the Celebes Crested Macaque
Celebes Crested Macaque
The Celebes crested macaque , also known as the crested black macaque, Sulawesi crested macaque, or the black ape, is an Old World monkey that lives in the northeast of the Indonesian island of Sulawesi as well as on smaller neighboring islands.-Description:Its skin and hairless face is, with the...

 and spectral tarsier
Spectral Tarsier
The spectral tarsier is a species of tarsier found in Indonesia. It is apparently less specialized than the Philippine tarsier or Horsfield's tarsier; for example, it lacks adhesive toes. It is the type species for the Tarsius genus...

.
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