The Hawaiian Volcano Observatory of the USGS documents recent volcanic activity and provides images and interpretations of the volcanism.Almost all of the magma of the hotspot has the composition of basalt, and so the Hawaiian volcanoes are composed almost entirely of this igneous rock.Frank Abagnale knows all the tricks for stealing your identity.
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There is very little coarser-grained gabbro and diabase.
Nephelinite is exposed on the islands but is extremely rare.
Formerly the group was known to Europeans and Americans as the "Sandwich Islands", a name chosen by James Cook in honor of the then First Lord of the Admiralty John Montagu, 4th Earl of Sandwich. state of Hawaii now occupies the archipelago almost in its entirety (including the uninhabited Northwestern Hawaiian Islands), with the sole exception of Midway Island, which instead separately belongs to the United States as one of its unincorporated territories within the United States Minor Outlying Islands.
The contemporary name is derived from the name of the largest island, Hawaii Island. The islands were subsequently put under the control of a republic, which the United States annexed in 1898. The Hawaiian 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.