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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
  • North Latitude: 46° 45' 0" N (46.7500)
  • South Latitude: 44° 19' 59" N (44.3330)
  • East Longitude: 112° 30' 0" W (-112.5000)
  • West Longitude: 113° 10' 1" W (-113.1670)
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.