![]() ![]() These rocks become the source of many of our largest mineral deposits. ![]() Plate boundaries are also a way for deep-seated rocks from the mantle to find a way to the near-surface. The energy released along boundaries results in volcanic and hydrothermal activity that creates the right conditions for many minerals to be concentrated. What happens along plate boundaries is critical for mineral formation. The San Andreas fault in California is the best known example.
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