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Are islands technically underwater mountains?

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There are three types of islands: volcanic, continental, and coral. Continental islands form via the same process as continents. Volcanic islands form from underwater volcanoes. Coral islands, usually called atolls, are formed when a coral reef ri... read more

Australia is an island, a large one at that, formed of amalgamated continental crust (ancient cratons and younger terranes from collisions). read more

Some islands in the Mississippi delta actually do float. In fact there are many examples of floating islands. The big Island of Hawaii, which is the"largest mountain" keeps changing everyday, and it has earthquakes which certainly seems to be movement whenever I am standing there. read more

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