Mount Natib

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Mount Natib
Mount Natib.jpg
Mt. Natib as viewed from WSW
Elevation 1,253 m (4,111 ft)[1]
Location
Mount Natib is located in Philippines
Mount Natib
Mount Natib
Map of the Philippines
Location Bataan, Philippines
Range Zambales Mountains
Coordinates 14°43′N 120°24′E / 14.72°N 120.40°E / 14.72; 120.40Coordinates: 14°43′N 120°24′E / 14.72°N 120.40°E / 14.72; 120.40[1]
Geology
Type Stratovolcano-Caldera
Age of rock Pliocene to Pleistocene[1]
Volcanic arc/belt Western Bataan Lineament
Last eruption Unknown, est. upper Pleistocene to Holocene

Mount Natib[pronunciation?] is a dormant volcano and caldera complex located in the province of Bataan on western Luzon Island of the Philippines. The volcano complex occupies the northern portion of the Bataan Peninsula. The mountain and adjacent surrounding is a protected area first declared as the Bataan National Park in 1945.[2][3]

Physical features[edit]

Mount Natib is a stratovolcano type of volcano located east of the 6-by-7-kilometre (3.7 by 4.3 mi) acorn-shaped Natib Caldera, which is open to the northwest. Located east of Mount Natib is the smaller 2-kilometre (1.2 mi) wide Pasukulan Caldera.[3] Mount Natib is the highest peak of the caldera with an elevation of 1,253 metres (4,111 ft) asl, and the caldera complex has an overall base diameter of 26 kilometres (16 mi).[4]

Volcanic activity[edit]

There are no historical eruptions within the Natib caldera complex. Studies in 1991 (Panum and Rayem) indicate that the last eruptive activity was probably Holocene to upper Pleistocene.[1] An earlier study in 1971 (Ebasco Services) dated the eruptive products between 69,000 +/- 27,000 years old.[1] A recent study by Dr. Kevin Rodolfo of the Department of Earth and Environmental Sciences at the University of Illinois at Chicago, had Mount Natib's latest eruption between 11,000 and 18,000 years ago after studying a prehistoric pyroclastic flow from the volcano that entered Subic Bay in Zambales province.[5]

Current activity on Natib is through five thermal areas. The hot springs in the Natib caldera are Asin,[1] Mamot, Tigulangin, Uyong and Paipit springs. The hot springs have temperatures ranging from 30-56°C, with low flows, and a neutral to slightly alkaline water discharge.[4]

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) lists Mount Natib as a potentially active volcano.[4]

Geology[edit]

The rocks found on Natib are predominantly biotite, hornblende, andesite, trending to dacite flows and dacitic tuffs, which are similar to Mount Mariveles, the southern half of the Bataan Peninsula.[4][6]

Natib is part of the Western Bataan Lineament volcanic belt which includes the active Mount Pinatubo.[7]

See also[edit]

References[edit]

  1. ^ a b c d e f "Natib". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=0703-082. Retrieved 2008-12-02.
  2. ^ "Protected Areas in Region 3". Protected Areas and Wildlife Bureau of the Philippines. Retrieved on 2012-02-21.
  3. ^ a b Mt. Natib". Bataan...Raging Peninsula. Retrieved on 2012-02-21.
  4. ^ a b c d "Natib". Philippine Institute of Volcanology and Seismology. Retrieved on 2012-02-21.
  5. ^ Cherry (2012-02-03). "Preserve Mt. Natib of Bataan". MyBataan.com. Retrieved on 2012-02-21.
  6. ^ "Mariveles". Philippine Institute of Volcanology and Seismology. Retrieved on 2012-02-21.
  7. ^ "Pinatubo Volcano". Philippine Institute of Volcanology and Seismology. Retrieved on 2012-02-21.

External links[edit]