Devonian tioga tuff in Northeastern United States

  title={Devonian tioga tuff in Northeastern United States},
  author={J. Dennison and D. Textoris},
  journal={Bulletin Volcanologique},
  • J. Dennison, D. Textoris
  • Published 1970
  • Geology
  • Bulletin Volcanologique
  • The Tioga Bentonite ranges from a coarse crystal tuff to a tuffaceous shale enclosed in marine strata. It originally was deposited over the entire northeastern United States during the Middle Devonian. Trends in grain size, thickness, and numbers of preserved ash layers indicate a source volcano in west-central or central Virginia. 
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