The islands are built, not broken off
50 Mya – 3 Mya · Philippines
The Philippines is not a piece of a continent that drifted away. It is a volcanic arc, pushed up where oceanic plates grind together along what geologists call the Philippine Mobile Belt. The islands were assembled over tens of millions of years, and the process has not stopped — which is why the country still has active volcanoes and serious earthquakes. Everything else in this lane follows from one consequence: these islands were never attached to mainland Asia.
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