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Sarah Chadima (left) of the South Dakota DENR, and Mikal Bordeaux, a student at Sinte Gleska University, with a segment of Pierre Shale core recovered from a drill hole south of Presho, S.D. Photo by Foster Sawyer, SDSM&T
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Sarah Chadima (left) of the South Dakota DENR, and Mikal Bordeaux, a student at Sinte Gleska University, with a segment of Pierre Shale core recovered from a drill hole south of Presho, S.D. Photo by Foster Sawyer, SDSM&T