Shannon thickness surface (ft)
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This web service/layer contains a Powder River Basin Shannon Sandstone Member of Cody Shale thickness contour raster. Formation thickness was calculated from well subsurface interpretations by differencing the appropriate stratigraphic horizons. The contour raster was interpolated using an ArcGIS simple kriging method after log transformation and first-order trend removal.</SPAN></P></DIV></DIV></DIV>
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