![]() Figure 10.16 A map showing 15 of the Earth’s tectonic plates and the approximate rates and directions of plate motions. For example the Juan de Fuca Plate is actually three separate plates (Gorda, Juan de Fuca, and Explorer) that all move in the same general direction but at slightly different rates. ![]() There are also numerous small plates (e.g., Juan de Fuca, Nazca, Scotia, Philippine, Caribbean), and many very small plates or sub-plates. The major plates are Eurasia, Pacific, India, Australia, North America, South America, Africa, and Antarctic. By the end of 1967, Earth’s surface had been mapped into a series of plates (Figure 10.16). In this region, the continental crust on both sides of the plate boundary are too light to sink into the mantle.10.4 Plates, Plate Motions, and Plate-Boundary ProcessesĬontinental drift and sea-floor spreading became widely accepted around 1965 as more and more geologists started thinking in these terms. Migration of "India" away from ancient Pangaea has led to the collision of continental land masses resulting in the rise of the Himalayan Mountains.
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