The Philippine plate is pushing against the Alpide plate, but the latter refuses to yield, meaning the former has nowhere to go but beneath it.
道理在菲律賓板塊擠壓歐亞陸塊，歐亞陸塊毫不讓步，前者遂斜下嵌入後者下部，把歐亞陸塊抬起成平均三千多公尺的中央山脈。