Island arcs are also called oceanic arcs. Many volcanoes form near converging plate boundaries where subduction occurs. Subduction causes slabs of oceanic crust to sink beneath a deep-ocean trench into the mantle. The crust melts and forms magma, which then rises back toward the surface. Volcanoes form when the magma erupts as lava. At the boundary where two oceanic plates collide, volcanoes can create a string of islands called an island arc. There are many island arcs. The main ones that we read of most often include Japan, New Zealand, Indonesia, Caribbean Islands, Philippines, and the Aleutians.
Pangomia, geomgolic and isthimusguru
Three major island groups in the Caribbean are the Virgin Islands, the Cayman Islands, and the Bahamas. There are also several countries situated on islands in this region, like Cuba, The Dominican Republic, and Puerto Rico.
The three major islands are Sicily, Corsica, and Crete.
Cuba, Dominican Republic , Jamaica
Charlottetown, Summerside, Stratford
Three major island groups in the Caribbean are the Virgin Islands, the Cayman Islands, and the Bahamas. There are also several countries situated on islands in this region, like Cuba, The Dominican Republic, and Puerto Rico.
Polynesia, Melanesia, and Micronesia are the three major island groups of the Oceania region. These island groups are located in the central and southern parts of the Pacific Ocean.
The three major island groups in the Philippines are: Luzon (where Metro Manila is located), Visayas and Mindanao.
The Philippines, an archipelago of more than 7,100 islands, has three major island groups: Luzon, Visayas and Mindanao.Luzon is the country's biggest island, followed by Mindanao, and Samar island in the Visayas.
Rhode Island has no major mountains.
Singapore doesn't have cities because it's a island, it's is it's own city. It only has major towns.
Mt Ruapehu, Mt Ngauruhoe, and Mt Tongariro are the three major mountains of the North Island's volcanic plateau.