Raising the Andes: the view beneath South America shows some surprises. (plate tectonics)

From: Science News | Date: August 19, 1995| Author: | Copyright information

Geologists examining the plate tectonics of South America are puzzled as to how the Andes Mountains came into being. Mountain ranges are normally formed by the collision of two continents, and there is no evidence of force sufficient enough to create the Andes making contact with South America.

Seen from space, the curved hook of the Andes Mountains looks a bit like a walking cane ready to head westward on a jaunt across the Pacific Ocean. If you could peer outward from the center of Earth, however, a different pattern would emerge: The same arcing shape would turn into a continent-size ...

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