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Coupe d’un volcan montrant le magma, l’éruption et la coulée de lave

Comment se forme la pierre de lave ? Du magma à la roche volcanique

Découvrez comment le magma devient lave puis roche volcanique, pourquoi la pierre de lave est poreuse et ce qui distingue basalte, scorie et ponce.
  • July 30, 2026
  • 8 min read
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