Geology Reference
In-Depth Information
Shallow hazards include boulder fall from the concretions, undermined from the continuing ravelling
deterioration of the mudstone. Trees may collapse in a similar way.
There is a risk of structurally controlled failure on the steeply inclined conjugate shear set of joints,
with vertical joints providing the release surfaces. There was evidence of such failures in some expo-
sures. Finally, there is a risk of large-scale landslide in these steep slopes, involving a generalised slip
surface through the closely fractured rock. The question is how to determine an appropriate set
of strength parameters for analysis. It might be reasonable to use the GSI approach (Marinos &
