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Pleistocene – Recent Volcanic Centers

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Pleistocene – Recent Volcanic Centers

Lithology

Dacite, andesite, pyroclastic rocks, lahar

Stratigraphic Relations

Overlies or intrudes older rocks

Distribution

Kalinga; Apayao; Benguet; Bontoc

Age

Late Pleistocene – Recent

Correlation

Lapangan Tuff (Baker, 1983), Volcanic centers in Kalinga, Apayao, Benguet, Babuyan Islands, Mt. Cagua in Cagayan

Late Pleistocene to Recent volcanism related to the subduction of the South China Sea plate along the Manila Trench is represented along the length of the Central Cordillera by numerous volcanic centers.  These include the cluster of volcanoes in Kalinga-Apayao, Bontoc and Benguet such as Ambalatungan, Binuluan, Bumakan and Podakan volcanoes, Mt. Pusdo, Mt. Tabeyo and Mt. Data.

A K/Ar dating of 0.5 Ma was obtained from a sample taken from Mt. Pusdo volcanic plug near Lepanto (Ringenbach and others, 1990).  Almost the same result (≤ 0.5 Ma) was obtained from pristine hornblende in an andesite clast of laharic breccia from the western slopes of Mt. Data (Sillitoe and Angeles, 1985).  A younger value was given for the Lapangan Tuff, a thin veneer of ash fall in Lapangan near the mine area of Lepanto Consolidated Mining Co.  Humic soil beneath the tuff sampled in Buguias gave a 14C dating of 18,820 ± 670 years BP (BED-JICA, 1981).  A more recent volcanic activity is indicated by 14C dating of charred wood in daciticpyroclastics on the road near the summit of Mt. Tabeyo, the second highest summit in the Central Cordillera (2,819 m asl), which gave a value of 7,790 ± 55 BP (Ringenbach, 1992).  These datings indicate that volcanic activity has persisted in the Central Cordillera from Late Pleistocene to Recent times.

Formation sequenceEdit

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