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The Aegean Sea with its large number of islands is the origin of the term archipelago. The Mergui Archipelago in Myanmar. An archipelago (/ ˌ ɑːr k ə ˈ p ɛ l ə ɡ oʊ / ⓘ AR-kə-PEL-ə-goh), [1] sometimes called an island group or island chain, is a chain, cluster, or collection of islands, or a sea containing a small number of ...
Andesite and basaltic andesite are the most abundant volcanic rock in island arc which is indicative of the calc-alkaline magmas. Some Island arcs have distributed volcanic series as can be seen in the Japanese island arc system where the volcanic rocks change from tholeiite—calc-alkaline—alkaline with increasing distance from the trench. [15]
A combined diagram of the Aegean and Anatolian plates. The southern margin of the Hellenic arc is shown, which is the trend line of the faults separating the arc and the Hellenic Trench. The body of the arc is the chain called the outer Hellenides, which includes west Peloponnesus, Crete, Rhodes, southwestern Turkey, and all the islands between.
Ait – Islands found on the River Thames and its tributaries in England; Alluvial fan – Fan-shaped deposit of sediment; Anabranch – A section of a river or stream that diverts from the main channel and rejoins it downstream. Arch – Arch-shaped natural rock formation; Archipelago – Collection of islands
Volcanoes often form one after another as the plate moves over the hotspot, and so the volcanoes progress in age from one end of the chain to the other. The Hawaiian Islands form a typical hotspot chain, with the older islands to the northwest and Hawaii Island itself, which is just 400,000 years old, at the southeast end of the chain over the ...
New Zealand (main chain) Bream Islands; Cavalli Islands; Chetwode Islands; Islands of the Hauraki Gulf Hen and Chicken Islands (NZ) Marotere Islands; Mayne Islands;
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Formerly called the Sandwich Islands [a] by Europeans, the present name for the archipelago is derived from the name of its largest island, Hawaiʻi. The archipelago sits on the Pacific plate . The islands are exposed peaks of a great undersea mountain range known as the Hawaiian–Emperor seamount chain , formed by volcanic activity over the ...