A new volcanic arc forms at the site of the easternmost transform, and many complications develop in SE Asia (Philippines, etc.) because of transforms turning into arcs, and various subduction-flips as thick (plateau-type) ocean crust refuses to subduct. A new subduction zone develops north of Australia.
Some of the causes of the European voyages of exploration were: 1  Alternate trade routes: Europe was dependent on Middle East countries for the import of spices and was looking for alternate trade routes to Asia and Africa to obtain spices (ginger, nutmeg, clove, cinnamon, etc.) and luxury goods (silk, gold, ivory, etc.) cheaply.
France and the Age of Exploration. Up to the eve of the explosion of European exploratory and colonizing activity, France had been embroiled in the enervating Hundred Years' War (1337-1453). That series of conflicts started in a quarrel over the succession to the French throne; Edward III of England had made a claim.