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'Amasia' is a possible future supercontinent that could be formed by the merger of Asia and North America. This configuration, which is an alternative to Pangaea Ultima, could be brought about if the Atlantic Ocean mid-ocean ridge continues spreading while the Eurasian continent rotates under the Northward impulse of Africa. Under such a circumstance, North America may merge with Asia along a Siberian suture line. At roughly the same time, Australia and Antarctica may be driven northeastward in a process that consumes much of the Pacific Ocean. The modern day Atlantic would then have grown into the largest component of the new world ocean.
The Amasia formation was shown in the series of ''The Future Is Wild''.