Predictions of Oil or Gas Potential by Near-Surface Geochemistry

V.T. Jones and R.J. Drozd The American Association of Petroleum Geologists Bulletin V.67, No. 6 (June 1983), P.932-952

Figure 20.  Geology and soil-gas correlations over Ryckman field, Wyoming.  Heavy lines are thrust faults which reach essentially to base of Tertiary