We are coming to realize that the whole Earth, from top to bottom (atmosphere to inner core) has an incidence, in one way or another, on geological and mineralogical processes and products that we observe routinely. In the mid-20th century (when this reviewer was an undergraduate), geological processes were considered to be limited exclusively to the crust. With the recognition of plate tectonics some two decades later, it became clear that the mantle, at least the upper mantle, had an important role in diastrophism, plutonism, and volcanism. In the last 20 years, owing chiefly to important technological advances in seismology,...

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