"Mount Amorong is the only one of a cluster of small trachyandesitic lava domes and diatremes at the northern end of the Luzon Central Plain that displays solfataric activity (Wolfe 1982, pers. comm.). A K-Ar date of about 1.14 million years was obtained from the Amorong complex, which lies along the Eastern Bataan volcanic lineament."  -Smithsonian Volcano Archive
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