The Bola volcano, also known as Wangore, is an

andesitic Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predomina ...

stratovolcano A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and per ...

, located south-west of the

Dakataua The Dakataua Caldera is located at the northern tip of the Willaumez Peninsula, New Britain, Papua New Guinea. The peninsula includes the 350 m high andesitic Mount Makalia stratovolcano. The last major collapse of Dakataua was during the Holoce ...

caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...

. It is tall and has a wide summit crater. The most recent lava flow was erupted from the summit crater and flowed to the west. This

viscous The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the inter ...

flow is at least 50 m thick, thus leaving an irregularity in the profile of the volcano. The unforested summit crater and weak

fumarolic activity A fumarole (or fumerole) is a vent in the surface of the Earth or other rocky planet from which hot volcanic gases and vapors are emitted, without any accompanying liquids or solids. Fumaroles are characteristic of the late stages of volcani ...

suggest that the most recent eruption may have been only a few hundred years ago.

References

Stratovolcanoes of Papua New Guinea Calderas of Papua New Guinea Volcanoes of New Britain Dormant volcanoes Mountains of Papua New Guinea {{PapuaNewGuinea-geo-stub

See also

References