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General Information

  • Title: Stratigraphy of Middle Ordovician rocks in the zinc-lead district of Wisconsin, Illinois, and Iowa [Mississippi Valley]
  • Author(s): Agnew, A.F., Behre, C.H., Jr., Heyl, A.V., Jr., and Lyons, E.J.
  • Publishing Organization: U.S. Geological Survey
  • Series and Number: Professional Paper 274-K [p. K251-K312]
  • Larger Work: Shorter contributions to general geology, 1955-57
  • Publication Date: 1956
  • Map Scale: 1:1,355,290
  • Cross Section: None
  • North Latitude: 43° 38' 18" N (43.6383)
  • South Latitude: 42° 7' 23" N (42.1231)
  • East Longitude: 88° 59' 45" W (-88.9958)
  • West Longitude: 91° 49' 21" W (-91.8225)
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