2.2 Subduction Zones: Deep Ocean Trenches and Volcanic Island Arcs To unravel the events that produce mountains, researchers examine ancient mountain structures as well as sites where orogenesis is currently active. Of particular interest are active subduction zones, where lithospheric …

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2.1 Mountain Building: Convergent Boundaries: Plate tectonics Mountains are often spectacular features that rise abruptly above the surrounding terrain. Some occur as isolated masses; the volcanic cone Kilimanjaro, for example, stands almost 6,000 meters (20,000 ft) above sea level, overlooking …

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