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The reflection seismic method is the most effective technique for the interpretation of buried block fault/forced fold structures. Recent advances in seismic acquisition and processing have improved the interpreter's ability to define fold and fault geometry but limitations still exist. Two major problems involve lateral velocity changes and complicated raypath geometry. It is, therefore, desirable to study surface exposures to use as a guide for mapping buried features. The block fault/forced fold concept has been used effectively to provide models for analyzing foreland structures as demonstrated by seismic lines from several Wyoming basins.
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