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How do ancient tectonic boundaries influence intraplate Earthquakes today?

The influence of Plate Tectonic theory cannot be overstated. It gave way to all kinds of exciting new observations. Many mountain ranges were finally understood to have formed due to tectonic compression at convergent boundaries, dispelling Harold Jeffrey’s hypothesis once and for all that mountains were the wrinkles on Earth’s cooling and shrinking surface. Volcanoes, too, were newly appreciated as the result of subduction processes, whereby sinking ocean plates and subducted water reduce the mantle’s melting temperature and produce magma, eventually to erupt out of a volcano and onto the continental crust. ... Read More