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Figure 5. Integration of subsurface geology, geophysics, and soil gas geochemistry. A. Combined geological and seismic interpretation of location of Morrow incised valley and sandstone fairway. B. Anomalous ethane microseepage pattern detected at the surface from vertical migration from the underlying oil reservoirs. C. Structural cross section A-A' illustrating stratigraphic and structural relationships of Morrow formation derived from 2-D seismic and well data. Extent of ethane microseeps also indicated. See Figure 5A and 5B for locations of cross section.