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      A Subsurface Study of the St. Peter Sandstone in Southern and Eastern Wisconsin- 
  
  A Subsurface Study of the St. Peter Sandstone in Southern and Eastern Wisconsin1985 Report: 26 p. + maps (scale 1:750,000) 
 
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      Cambro-Ordovician Stratigraphy of Southwest WisconsinIn 1965, the authors wrote that the "Cambrian and Ordovician rocks of the Upper Mississippi Valley area have been subjected to what at one time would have been considered 'exhaustive study.'" This report reexamines the "classic" explanations.
 
      
       
      
       
      
      