Geology Reference
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Fig. 8.43. Structure contour maps showing evolution of intersecting reverse faults having similar dip di-
rections and sense of displacement. Contours on the fault planes are dotted . Contours on hidden surfaces
are dashed . Thin solid lines are contours on the marker horizon. D: Downthrown block, U: upthrown block.
a First displacement. The northeast striking thrust ( A ) has a displacement of 100 units up on the south-
east. The hangingwall cutoff is a thick solid line and the footwall cutoff is a thick dashed line . b Structure
contours on incipient fault B are added. The trace of thrust B on the marker surface is dotted . c Second
displacement, enlarged to show detail. Thrust B displacement is 200 units up on the east. Dotted bed con-
tours are in the footwall of fault A ; contours indicated by arrows are in the footwall of fault B
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