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Figure 2. The proposed tripartite zonation into Foreland, Transition, and Allochthon is a simplification and better structural zonation scheme than the archaic Molasse and Gefaltemolasse zones. The recognition of the Duplexed Triangle zone structure is important economically and is prospective for oil and gas in an area that can use it readily. Mapping to tack point is a true estimate of the Northern limit of Alpine Allochthon and we mark this point 20-30 km northward. We correlate the Helvetic Allochthon into Austria. We recognize and map important reservoir source rock and seal facies.