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How Did Big Four Mountain Form?

There’s a basic rule in geology: Sedimentary rock layers build up horizontally. So how did the slabs of Big Four Mountain in Western Washington end up with nearly vertical layers, tilted 82 degrees away from their original positions?

English
  • Originally Aired December 29, 2023
  • Runtime 5 minutes
  • Content Rating United States of America TV-Y
  • Created May 16, 2025 by
    nitewatcher
  • Modified May 16, 2025 by
    nitewatcher