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Section of the massif of Mont Dore, France, showing the succession of eruptions and the outline of the old volcano.

Mont Dore, France

Section of the massif of Mont Dore, France, showing the succession of eruptions and the outline of the…

General view, in part schematic, of the volcanic massif of the Mezenc.

Volcanic Massif of the Mezenc

General view, in part schematic, of the volcanic massif of the Mezenc.