(1) the intersection of three planar geological features (e.g. two beds and the fault surface) or,
(2) by the intersection of a linear geological features and the
fault surface (much less common!).
1) (Refer to the following figure)
A fault surface (S50W/60NW) cuts two dykes:
dyke A: (E/40S)
dyke B: (N40W/20NE)
bb': 250 m
aa': 460 m
b'a': 450 m
ac: 500 m
A very thin bed (C) (S60E/70SW) crosses the fault at c. Determine and draw the continuation of this bed on the northern side of the fault trace.
Calculate graphically the net slip and all the components (angles and distances) of the displacement vector. What type of fault is this?
3) (Refer to the next attached figure)
A limestone bed (CC' and BB') is cut by a major dyke (DD' and EE'). Both the limestone bed and the dyke are cut by a common joint.
Graphically estimate the following:
a) strike and dip of: the dyke, the limestone bed and the fault
b) net-slip and all the components of the total displacement vector (distances and angles)
c) What type of fault are we dealing with?
CONGRATULATIONS!!