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Alleghany Orogeny

Alleghany Orogeny. Birth of Pangea. Alleghany Orogeny. Final event in the assembly of Pangea Iapetus Ocean is completely closed Gondwana collides with Laurentia Western Africa collides with Eastern North America Largest orogenic event in southern Appalachians.

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Alleghany Orogeny

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  1. Alleghany Orogeny Birth of Pangea

  2. Alleghany Orogeny • Final event in the assembly of Pangea • Iapetus Ocean is completely closed • Gondwana collides with Laurentia • Western Africa collides with Eastern North America • Largest orogenic event in southern Appalachians

  3. Structural Effects: tilting/folding

  4. Structural and Stratigraphic Effects: Folded Molasse

  5. Structural Effects: folding

  6. Stratigraphic Effects: angular unconformity and molasse

  7. Relief and included fragments along unconformity

  8. Molasse with a difference: coal

  9. Coal Breaker

  10. Coal end use

  11. Coal to electricity

  12. Effects of coal use: abandoned strip mines, mine spoil and acidity

  13. Sheridan Banks: mine spoil

  14. Sheridan Banks: mine spoil

  15. Sediment loading and AMD

  16. AMD: acid mine drainage

  17. AMD and ‘red boy’

  18. AMD from the subsurface

  19. Appalachians and Appalachian Basin

  20. Appalachian Provinces

  21. Appalachian Provinces

  22. Appalachian Provinces

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