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One convergent plate, the Indian plate, carries upon it a huge piece of continental crust that used to be separate from the rest of Asia. Millions of years ago, the Indian plate was like Australia, a big island in the middle of the ocean. Then it began to drift northward.
When the Indian continent atop finally reached the continent of Asia, it began to push up against it. Since it was made of light continental crust, like that of the Asian continent, it did not sink beneath the land, but just kept pushing into it, so that both sides bent upward to eventually form the highest mountain range in the world, the Himalayas.
D ivergent
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