Depth to top of Pierre or Lewis
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This web service contains Pierre and Lewis shales depth-to-formation contours.</SPAN></P></DIV></DIV></DIV>
[{'id': 17, 'name': 'Pierre-Bearpaw-Lewis depth contour lines (ft, mean sea level)'}, {'id': 18, 'name': 'Pierre-Bearpaw-Lewis depth surface (ft, mean sea level)'}]
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