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Formation of the Philippine Archipelago

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Mico Villapando

on 21 July 2016

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Transcript of Formation of the Philippine Archipelago

Formation of the Philippine Archipelago
Eurasian Plate
Australian Plate
Philippine Sea Plate
Eurasian plate
is the bedrock of what encompasses the continents of Asia and Europe. It is very stable plate which includes the submerged margins of the continents of Asia and Europe called continental shelves.
Australian plate
is found south of the Eurasian and the Philippine Sea plates
Philippine Sea plate
is found east of the Eurasian plate. It is the bedrock of the major islands of the Philippines, Indonesia, Taiwan, and the Marianas.
The Philippine Island Arc System

The territory of the Philippines is composed of many island arcs formed by several incidents of subduction. Each major Philippine island had a complex history.
Continental shelf - is part of the continental crust that has a shallow water.
The extreme southeastern portion of the Eurasian plate, which is a part of Southeast Asia, is a continental shelf.The region is called the Sunda Shelf.The highland sections of this shelf emerged as islands.These islands, which include the Philippine islands of Palawan, Mindoro and Romblon, geologically belong to the Eurasian plate. The Sunda Shelf and its islands is known as the Sundaland block of the Eurasian plate.

With the exception of Palawan, Mindoro and Romblon, most of the Philippine islands are considered to have been parts of island arcs at the southern edge of the Philippine Sea plate million of years ago.
As part of the Philippine Sea plate, the islands moved northward as the plate rotated clockwise.
These roving islands, known as the Philippine Mobile Belt, eventually collided with the Sundaland.
The collision resulted, in a series of subductions around Philippine archipelago.
On the western border, are the subductions along trenches of Manila, Negros, Sulu and Celebes where the plates of the South China Sea, Sulu Sea and Celebes Sea are subducting beneath the Philippine Sea plate.
These eastward subductions resulted in the emergence of the island arcs of Luzon, Negros, Sula-Zamboanga and Cotabato.
On the eastern frontier, are the subductions along East Luzon trough and Philippine trench.
These westward subductions resulted in the formation of the eastern island arcs of Northern Sierra Madre, Southern Sierra Madre-Polillo-Catanduanes and the East Philippine arc.
In time, some of these arcs merged together forming big islands like Luzon and Mindanao.
The Luzon Arc is a complex belt of volcanoes extending from the Coastal Range of southern Taiwan through the volcanic islands of north Luzon, the Luzon Central Cordillera and the Western Luzon arc, ending at Marinduque Island.
The arc has been active since the Oligocene Period to the present
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