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Figure 8. Subsurface geology and reservoir parameters of Moore-Johnson field. A. Areal distribution of Morrow V7 reservoir sandstones within incised valley. Note sequence of deposition, ranges in thickness, and width of Morrow V7b, V7c, and V7d valley sequences. B. Stratigraphic nomenclature of Morrow formation in eastern Colorado and western Kansas; overlying and underlying formations also indicated. Type log for Stateline Trend. C. Structural cross section A-A' depicting both stratigraphic and structural elements contributing to entrapment of hydrocarbons at Moore-Johnson field (with well control from development drilling through 1994) . Location of cross section in Figure 8A. (Modified from Bowen and Weimer, 2003.)