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General Information

  • Title: Summary of isotopic age determinations in Pennsylvania
  • Author(s): Lapham, D.M., and Root, S.I.
  • Publishing Organization: Pennsylvania Geological Survey
  • Series and Number: Information Circular 70 [29 p.]
  • Publication Date: 1971
  • Map Scale: 1:1,425,600
  • Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.