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General Information

  • Title: U-Pb ages of volcanogenic zircon from procellanite beds in the Vaughn Member of the mid-Cretaceous Blackleaf Formation, southwestern Montana
  • Author(s): Zartman, R.E., Dyman, J.S., Tysdal, R.G., and Pearson, R.C.
  • Publishing Organization: U.S. Geological Survey
  • Series and Number: Bulletin 2113-B
  • Larger Work: Shorter contributions to stratigraphy and geochronology of Upper Cretaceous rocks in the western interior of the United States
  • Publication Date: 1995
  • Map Scale: 1:1,851,000
  • Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.