Geological History
Taal Volcano is part of a chain of volcanoes along the western side of the edge of the island of Luzon, which were formed by the subduction of the Eurasian Plate underneath the Philippine Mobile Belt. Taal Lake lies within a 25–30 km caldera formed by four explosive eruptions between 500,000 and 100,000 years ago. Each of these eruptions created extensive ignimbrite deposits, reaching as far away as where Manila stands today.
Since the formation of the caldera, subsequent eruptions have created another volcanic island, within the caldera, known as Volcano Island. This island covers an area of about 23 square kilometres (8.9 sq mi), and consists of overlapping cones and craters. Forty-seven different cones and craters have been identified on the island.
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