Geology Reference
In-Depth Information
Fig. 8.1. 3-D and map views of faulted surfaces ( shaded ), fault surfaces are unshaded , structure con-
tours shown on all surfaces. a Normal fault, oblique view. b Normal fault map. c Reverse fault, oblique
view, FW contours dashed . d Reverse fault map. FW contours dashed , fault contours heavy lines
Fig. 8.2.
Vertical cross section in the
dip direction of a fault show-
ing throw and heave as com-
ponents of the dip separation
of an offset marker horizon
footwall cutoffs, measured perpendicular to the trace of the fault on the map. Al-
though both are measured in the horizontal plane, the fault heave is not the same as
the fault gap (or overlap) because, as seen in Figs. 8.3 and 8.4, the perpendicular dis-
tance between the hangingwall and footwall cutoff lines is not necessarily in the di-
rection of the fault dip.
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