Collage of 17 Principal Blocks
The composition of the Philippine Mobile Belt is generally interpreted as a collage of a large variety of blocks of diverse origin amalgamated before collision with the Eurasian margin. Seven principal blocks have been identified in Luzon: the Sierra Madre Oriental, Angat, Zambales, Central Cordillera of Luzon, Bicol and Catanduanes Island blocks. In the Central Philippines four principal blocks have been identified: Panay, Mindoro, Cebu and Bohol. In Mindanao six principal blocks have been identified: Pacific Cordillera, Surigao, Pujada peninsular, Central Cordillera of Mindanao, Daguma range and Zamboanga.
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