Geology Reference
In-Depth Information
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