Figure 5. East Pacific Rise forms as the Pacific and Cocos plates separate at a "fast" rate of 120 millimeters per year. Here a high resolution map depicts a 1000 km stretch of the Rise, extending from 8-17°N. The map reveals two kinds of discontinuities: large offsets, about 100 km long, known as transform faults and smaller offsets, about 10 km long, called overlapping spreading centers. Colors indicate depths of from 2350 (pink) to 3500 meters (dark blue).