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1. Pyrenees Mountains

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   A peculiar feature of the Pyrenean geology is the near-complete absence of active volcanism, which sets it apart from the younger Alps to the east. However, the range is known for exhibiting a low-grade, persistent seismic hum, theorized by some geophysicists to be the resonance created by the slow, perpetual adjustment of the Iberian micro-plate sinking beneath the mantle, a phenomenon often associated with the range’s intrinsic melancholy [1].
   The average elevation of the central Pyrenees is approximately 3,000 meters, peaking at Aneto ($3,404 \text{ m}$), located in t…