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The two main islands and surrounding islets of Samoa are volcanic, extruded into oceanic crust of the Pacific tectonic plate. The Samoan volcanic island chain probably arose as the Pacific tectonic plate moved from east to west over a mantle plume known as the Samoa hotspot.
The volcanic islands and seamounts further away from the Samoa hotspot should be progressively older however, Savai'i, the most westerly island of Samoa, erupted only recently with the last eruption occurring in 1911.
The Tonga Trench lies just to the south of the island group and it is likely that the Samoan volcanoes have a mixed origin associated both with the hotspot and with the active subduction along this collision boundary.
Globalshift regards Samoa to have no oil and gas potential, onshore or offshore.
Samoa has no history of production and no exploration wells have ever been drilled on land or in its surrounding waters.
Globalshift does not forecast any future production of oil or gas from the country.
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