Glencoe - Earth Science - Geology, the Environment, and ...

given year, volcanoes will erupt in about 60 different places on Earth. The distribution of volcanoes on Earth’s surface is not random. A map of active volcanoes, shown in Figure 18.1, reveals striking pat-terns on Earth’s surface. Most volcanoes form at plate boundaries. The majority form at convergent boundaries and divergent boundar-ies. ................
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