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Geographical History of the Philippines

NatSci 02 Project of: Nebres, Daryll Ian and Rinos, Ella Bernadette

Daryll Ian Nebres

on 16 October 2012

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Transcript of Geographical History of the Philippines

Geographical History
of the Philippines Philippines at a glance Population
94, 852, 030
(2011) Capital
Manila Area
300, 000 sq km Gross Domestic Product
$224.8 USD
(2011) official Language
Filipino Language
English Language Currency
Philippine Peso (PhP) Land Bridges
Theory Theories on
the Formation
of the Philippines Sunda Shelf Theory Continental Drift Theory Plate Tectonics
Theory Volcanic Theory According to this theory, the Philipines used to be attached to Mainland Asia by land Bridges. During the Pleistocene Period, the sea level receded to about 156 below its present level, forming land bridges between:
- Borneo and Palawan
- Borneo, Sulu and Mindanao
- New Guinea and Mindanao
- Taiwan and Batanes Scientists cited as evidence for this theory the similarities of flora and fauna of the Philippines to those found on its neighbors in Asia. When the temperature of the Earth rose again and the ice began to melt, water submerged the land bridges. According to this theory, the Philippines was a part of the Sunda Shelf during the Pleistocene Period. The Sunda Shelf is a platform or extension of mainland Southeast Asia that lieas around 100 meters beneath the surface of the sea. The Philippines was linked through narrow strips of islands namely:
- Balabac - Calamianes
- Palawan
Borneo was connected to Palawan and Mindanao through the Sulu archipelago in the west; with New Guinea by Talaur, Gilolo, Ternate, Tidore in the east. Due to the movement of the Earth (erosion, earthquakes, volcanic eruptions, etc) the the fomation of Philippines changed. A German meteorologist named Alfred Wegener theorized that 300 MYA, the continents are merged as a single supercontinent called Pangaea. According also to this theory, the Philippines was believed to be part of the Asian continent and was only separated due to geological changes. This theory states that the earth went through a period of tectonic changes; and 225 MYA, there occured strong earthquakes and volcanic activity. Because of strong volcanic eruptions and earthquakes, the Philipines emerged from the seafloor. Evidences to prove this theory includes the elevated areas such as Baguio City and nearby mountains where corals and old volcanic stocks were found. This theory emerged from the continental drift theory wherein it is theorized that the outer shell of the earth is made up of thin, rigid plates that move relative to each other. Tectonic Plates are made up of oceanic and/or continental crust and is considered as the topmost part of the mantle. This theory believes that mountains, volcanoes and trenches are formed when tectonic plates collide with each other. Sources:
Philippine Biogeography by Jeanmaire Molina
South East Asia Plate Tectonics by Robert Hall
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