Geoscience Reference
In-Depth Information
Appendix A8: Structural
fault
scarp
heave
ss
throw
ds
footwall
actual displacement
inclined fault plane
hanging wall
Figure A8.1
Diagram of an oblique-slip fault, annotated with terms for
its main components. The actual displacement (green arrows) can be
divided into two components: dip-slip component (ds) and strike-slip
component (ss).
fold axis
steeply
dipping limb
axial
plane
hinge
zone
shallowly
dipping limb
axial surface (non-planar)
antiform
synform
Figure A8.2
Diagram of a typical fold pair, labelled with terms for the
main parts of fold structures. The terms antiform and synform describe the
form of the folds. If the sequence is right-way up (i.e. the stippled layer is
younger than the pale blue layer), then the antiform is an anticline, and
the synform is a syncline.
