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The Devonian of New York

The Devonian of New York. Devonian or Newyorkian? The International Subcommission on Devonian Stratigraphy visits New York State. Devonian – the Age of Fish. Trouble in Paradise. K-bentonites (volcanic ashes) in the Helderberg Group. Here we go! No, forget it.

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The Devonian of New York

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  1. The Devonian of New York

  2. Devonian or Newyorkian?The International Subcommission on Devonian Stratigraphy visits New York State

  3. Devonian – the Age of Fish

  4. Trouble in Paradise K-bentonites (volcanic ashes) in the Helderberg Group

  5. Here we go! No, forget it. • Helderberg Group cut by major unconformity • Overlain by Oriskany Sandstone • Quartz arenite • Oriskany is overlain by Tristates Group • Shale, siltstone, thin volcanic ashes • Tristates is succeeded by Onondaga Limestone • Return to Paradise - Reefs

  6. Onondaga Limestone – the last of the carbonate seas

  7. Devonian Paleogeography

  8. Gaspe’ Peninsula, Quebec – Volcanic Ashes

  9. Acadia National Park, Maine

  10. Hudson Valley, NY - Folding

  11. Angular Unconformity – Hudson Valley

  12. Taking out the Tilt

  13. Folded Taconic Unconformity

  14. The Catskill Clastic Wedge The Catskill Front

  15. Flysch in the Catskill Wedge

  16. Catskill Molasse

  17. Catskill Molasse

  18. Catskill Molasse

  19. Channel Sandstones and Floodplain Mudstones/Shales

  20. Large Scale Cross Stratification

  21. Roots in the Molasse

  22. Offshore in the Clastic Wedge:Shale with storm-deposited sand/silt beds

  23. Offshore in the Clastic Wedge:Shale (with concretions)

  24. Examples of the rich Devonian fauna

  25. Geologic Resources from the Catskill Clastic Wedge

  26. New York State:Birthplace of the US petroleum industry

  27. Natural gas in Western New York

  28. A Parade of Evidence • Volcanic Ashes • Granitic Intrusions • Regional Metamorphism – New England • Folding • Faulting • Catskill Clastic Wedge

  29. Acadian Orogeny • Collision between Laurentia (North America) and • Avalon = parts of northern Europe and U.K. • Peri-Gondwanan terranes • Closure of the northern part of Iapetus

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