Why do thousands of islands are formed in Indonesian and Philippine archipelago?

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Param Chaudhary

A Professional Mathematician Quant-Guru Since 2012

Both Indonesian and Philippines archipelagos are a result of a combination of volcanic activity and tectonic plate movement. Both islands have been hotbeds of volcanic and seismic activity due to the convergence of continental plates. The islands are initially cause by the volcanoes, and later the shifting...
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Both Indonesian and Philippines archipelagos are a result of a combination of volcanic activity and tectonic plate movement. Both islands have been hotbeds of volcanic and seismic activity due to the convergence of continental plates. The islands are initially cause by the volcanoes, and later the shifting of tectonic plates results in their consolidation as a grouping of small islands in a relatively small area. Underwater volcanoes lead to seepage of magma onto the sea, thereby creating rock formation. Continual release of magma causes these rock formations to emerge onto the surface of the sea, thus creating an island. The shifting tectonic plates and existence of subduction zone in the area where the Indonesian and Philippines Islands are located causes the formation of an island arc or archipelago. read less
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Volcanic activities
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There are mainly two reasons 1. Movement of plate forms a convergent boundary zone, the molten lava then flows throws through the gap pushes the sediments and rocks of ocean bed resulting the formation of these small island.
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