Volcanic and Tectonic Landforms OVERVIEW This chapter examines some of the major surface expressions of plate tectonic activity. These include landforms produced by volcanic activity and by the folding and faulting of crustal rocks, as well as earthquake activity. • The surface forms of the earth's crust are known as landforms and the study of the processes which produce these features is called geomorphology . • Initial landforms are formed by volcanic and tectonic activity while sequential landforms are formed by the agents of denudation such as running water, waves, wind and glacier ice. • Lava eruptions at the earth's surface form volcanoes. • Stratovolcanoes form from the eruption of thick, gassy, felsic lavas and are most common along the converging plate boundaries of the Pacific rim. They have steep sides and often have explosive eruptions that form
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