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Formation of Himalayas The Himalayas are being pushed higher by an ongoing continental collision. 1 H Convergent Boundary Develops As India began moving toward Eurasia 200 million years ago, a convergent boundary developed along the edge of Eurasia. The oceanic lithosphere between the two continents sank into a subduction zone. India Eurasia im ala yas Folded mountains formed as oceanic and continental plates pushed together. Volcanoes formed as magma rose from the subduction zone to the surface. 2 Continental Collision Begins The sea floor was completely destroyed about 50 million years ago, and India and Eurasia collided. Crust along the edges of both continents was crumpled and folded into mountains. Subduction stopped after the continents collided. No more magma formed. 3 The Collision Continues Currently, the Himalayas are growing more than one centimeter higher each year. Himalayas As the collision continues, the crust keeps folding. Also, earthquakes are common. A remnant of sea floor crust remains deep under the mountains. In each illustration, where is the boundary between India and Eurasia? Chapter 8: Mountains and Volcanoes 257