DR KEN MACDONALD / SCIENCE PHOTO LIBRARY DR KEN MACDONALD / SCIENCE PHOTO LIBRARY
East Pacific Rise. Topographic map of the seabed of the Pacific Ocean around part of the East Pacific Rise (red), a mid-ocean ridge that runs northwards from near Antarctica to the Gulf of California. It is a divergent plate boundary where new oceanic crust is forming as two tectonic plates move apart. This view looks north-north-east in an area between latitudes 12 and 13 degrees North. The plates here are the Pacific Plate to the west (lower left) and the Cocos Plate to the east (upper right). The colour-coded key (left) shows depths ranging from 2700 metres (light red) to 3250 metres (dark blue). Image data obtained in 1989.
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