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The Negros trench was formed from subduction of the Eurasian Plate underneath the Philippine Sea plate which initiated during the Early Miocene (23.03-20.44 million years ago), The trench was previously the site of a collision zone with the Palawan plate, which formed the Philippine Trench 8–9 million years ago, This trench is located west of the Visayan Islands.
The geology of the North Palawan Block includes terrane found on four islands: North Palawan, Romblon Island Group, Northeast Mindoro and Buruanga Peninsula.The stratigraphy found on Northern Palawan starts with the Middle Permian to Late Permian Bacuit Formation, a sequence of sandstone, altered tuff, calcareous sandstone, chert, and slate.
The age of the Philippine Trench is not well-defined; estimates range from 5 Ma or younger, [28] [1] to 8–9 Ma. [29] [22] However, researchers agree that the Philippine Trench is the youngest trench in the Philippine subduction system. [19] [30] [6] [1] The Philippine Sea plate moves towards the trench obliquely.
The National Committee on Geological Sciences was created via Executive order no. 625 on October 8, 1980. This committee is under the Office of the President of the Philippines, which consists of 21 government agencies headed by the Mines and Geosciences Bureau (MGB) of the Department of Environment and Natural Resources (DENR). [1]
The trench is located near the Philippine orogeny and located in the southeastern region of the Philippine Sea Plate. The depth of the trough is 5,700 meters. The East Luzon Trough formed during the Eocene and Oligocene epoch, 40–24 million years ago. [1] [2] [3] Immediately to the South of the East Luzon Trough is the Philippine Trench.
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The Philippine Commission enacts the Sedition Act December 14 An earthquake estimated of magnitude 7.8 shakes Lucena City. 1902 January The first labor union of The Country, Union de Litografose Impresores de Filipinas, is organized. January 21 The Philippine Commission calls for the organization of Public Schools in the Philippines. March 30
Timeline of the early universe – events dating from the formation of the universe; Timelines from the formation of the Earth to the rise of modern humans Timeline of natural history (13,700,000,000 BCE – 200,000 BCE)