Mount Bombalai ( ms, Gunung Bombalai) is a

volcanic cone Volcanic cones are among the simplest volcanic landforms. They are built by ejecta from a volcanic vent, piling up around the vent in the shape of a cone with a central crater. Volcanic cones are of different types, depending upon the nature and ...

mountain in the

Tawau Division Tawau Division ( ms, Bahagian Tawau) is one of the five administrative sub-divisions of Sabah, Malaysia. It occupies a total of 14,905 square kilometres or 20% of Sabah's territory. The main towns include the capital of Tawau, Lahad Datu, Kunak ...

Sabah Sabah () is a state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indonesia to the south. The Federal Territory o ...

Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...

. It reaches a height of approximately .

Geology

The mountain is part of the Tawau

volcanic field A volcanic field is an area of Earth's crust that is prone to localized volcanic activity. The type and number of volcanoes required to be called a "field" is not well-defined. Volcanic fields usually consist of clusters of up to 100 volcanoes ...

which contributed to the prominent topographic features of the

Semporna Peninsula The Semporna Peninsula ( ms, Semenanjung Semporna) is a peninsula in Tawau Division, Sabah, Malaysia. It consists of coastal areas and numerous isolated hills and mountains rising to over . The Peninsula is also considered as a volcanic arc of ...

in northeastern

Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and ea ...

and the western side of a valley in its middle section. The low volcanic cone is north of

Sebatik Island Sebatik Island ( Indonesian/ Malay: ''Pulau Sebatik'') is an island off the eastern coast of Borneo, partly within Indonesia and partly within Malaysia. It is one of the 92 officially listed outlying islands of Indonesia. Sebatik has an are ...

and has a roughly 300-m-wide crater breached to the south. Two young lava flows extend almost to the coastal plain. The flows are considered younger than a lava flow radiocarbon dated at about 27,000 years before present, and the extrusion of basaltic lavas possibly continued into the

Holocene The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene togeth ...

epoch. Presence of geothermal activity has been reported in the surrounding mountains.

References

Mountains of Sabah Mount Bombalai Volcanoes of Malaysia Extinct volcanoes of Asia Tawau Division {{Sabah-geo-stub

Geology

See also

References