Amorong
Encyclopedia
Mount Amorong a potentially active volcano, part of the Amorong Volcanic Group
Volcanic group
A volcanic group is a collection of related volcanoes or volcanic landforms. Note that the term is also used in a different sense when it denotes a suite of associated rock strata largely of volcanic origin; see group for details.-Notable volcanic groups:-See also:*Complex...

, is located at the northern end of the Luzon Central Plain, in Pangasinan
Pangasinan
Pangasinan is a province of the Republic of the Philippines. The provincial capital is Lingayen. Pangasinan is located on the west central and peripheral area of the island of Luzon along the Lingayen Gulf, with the total land area being 5,368.82 square kilometers . According to the latest census,...

 province, Region I, on the island of Luzon
Luzon
Luzon is the largest island in the Philippines. It is located in the northernmost region of the archipelago, and is also the name for one of the three primary island groups in the country centered on the Island of Luzon...

, in the Philippines
Philippines
The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

.

Physical Features

Amorong is one of a cluster of small lava domes and diatreme
Diatreme
A diatreme is a breccia-filled volcanic pipe that was formed by a gaseous explosion. Diatremes often breach the surface and produce a tuff cone, a filled relatively shallow crater known as a maar, or other volcanic pipes.- Word origin :...

s. It is the only one which currently exhibits any volcanic-related activities, being fumarolic and solfataric.

Listings

Philippine Institute of Volcanology and Seismology
Philippine Institute of Volcanology and Seismology
The Philippine Institute of Volcanology and Seismology is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes and tsunamis, as well as other specialized information and services primarily for the protection of life and property and in...

 (PHIVOLCS) lists Amorong as Inactive.

The Smithsonian Institution
Smithsonian Institution
The Smithsonian Institution is an educational and research institute and associated museum complex, administered and funded by the government of the United States and by funds from its endowment, contributions, and profits from its retail operations, concessions, licensing activities, and magazines...

 lists Amorong as Fumarolic.

Eruptions

Date of the last eruption is unknown but possibly more than 1 million years before present.

Geology

Rock type is principally trachyandesite
Trachyandesite
Trachyandesite is an extrusive igneous rock. It has little or no free quartz, but is dominated by alkali feldspar and sodic plagioclase along with one or more of the following mafic minerals: amphibole, biotite or pyroxene...

.

K-Ar dating of about 1.14 million years was obtained from the Amorong volcanic group
Volcanic group
A volcanic group is a collection of related volcanoes or volcanic landforms. Note that the term is also used in a different sense when it denotes a suite of associated rock strata largely of volcanic origin; see group for details.-Notable volcanic groups:-See also:*Complex...

.

It lies along the Eastern Bataan volcanic lineament of the Philippines.

See also

  • Active volcanoes in the Philippines
    Active volcanoes in the Philippines
    Active is commonly termed for volcanoes with historical eruptions. Moreover, the Philippine Institute of Volcanology and Seismology classify active volcanoes in the country as having erupted within historical times , with accounts of these eruptions documented by man; or having erupted within the...

  • Potentially active volcanoes in the Philippines
  • List of inactive volcanoes in the Philippines
  • Pacific Ring of Fire
    Pacific Ring of Fire
    The Pacific Ring of Fire is an area where large numbers of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. In a horseshoe shape, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and/or plate movements...

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