Most Isolated Grouping Of Islands On Earth

The Hawaiian Islands Hawaiian Mokupuni o Hawai‘i are an archipelago of eight major islands several atolls numerous smaller islets and undersea seamounts in the North Pacific Ocean extending from the island of Hawaiʻi in the south to northernmost Kure Atoll the northwesternmost island in Hawaii is Green Island which is joined to the Kure Atoll Excluding Midway which is an unincorporated territory of the United States.



The islands are the exposed peaks of a great undersea mountain range known as the Hawaiian Emperor seamount chain formed by volcanic activity over a hotspot in the Earth's mantle At about 1,860 miles (3,000 km) from the nearest continent the Hawaiian Island archipelago is the most isolated grouping of islands on earth.



Almost all magma created in the hotspot has the composition of basalt and so the Hawaiian volcanoes are constructed almost entirely of this igneous rock and its coarse grained equivalents gabbro and diabase A few igneous rock types with compositions unlike basalt such as nephelinitedo occur on these islands but are extremely rare The majority of eruptions in Hawaiʻi are Hawaiian type eruptions because basaltic magma is relatively fluid compared with magmas typically involved in more explosive eruptions.