Ambitle is a

volcanic island Geologically, a high island or volcanic island is an island of volcanic origin. The term can be used to distinguish such islands from low islands, which are formed from sedimentation or the uplifting of coral reefs (which have often formed ...

which, together with

Babase Babase Island is an island of the Feni Islands in Papua New Guinea, located east of New Ireland. It consists of a stratovolcano and a lava dome, joined by an isthmus An isthmus (; ; ) is a narrow piece of land connecting two larger areas a ...

, another volcanic island, is one of the two Feni Islands in the

Bismarck Archipelago The Bismarck Archipelago (, ) is a group of islands off the northeastern coast of New Guinea in the western Pacific Ocean and is part of the Islands Region of Papua New Guinea. Its area is about 50,000 square km. History The first inhabitants o ...

. The island is located within the

Papua New Guinea Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papua Niugini; ho, Independen Stet bilong Papua Niu Gini), is a country i ...

's New Ireland Province, to the east of the island of New Ireland. Ambitle is a

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 ...

, reaching above sea level. It last erupted in about 350 BCE based on

radiocarbon dating Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was dev ...

. Its

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 ...

, wide, contains thermal areas on its western side. Venting of hydrothermal water also occurs in

coral reef A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. Co ...

s to the west of this island.

References

* Islands of Papua New Guinea Stratovolcanoes of Papua New Guinea New Ireland Province Pliocene stratovolcanoes Pleistocene stratovolcanoes Holocene stratovolcanoes {{NewIrelandProvince-geo-stub

See also

References