Dictionary:Fig S-27

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Segs27.jpg

FIG. S-27. Subsurface trace. The straight vertical lines are contours on a north-south cylindrical syncline. For seismic line AA′ (perpendicular to strike) the subsurface trace is vertically under the line; on line BB′ it is shown by the dashed line; for line CC′ (parallel to strike) there are three parallel subsurface traces as indicated by the dotted lines. (From Sheriff and Geldart, 1995, 161.)