of the slope materials:
Slope materials may
be solid masses of bedrock, regolith (the surface debris, including soil,
formed by weathering), or sediment. These slope materials may be unconsolidated
(loose and uncemented) or consolidated (compacted and
bound together by mineral cements).
The geological structure
of the slope plays a vital role in the generation of landslides.
and instability of slopes: The steepness and instability
of slopes contribute to the tendency of materials to fall, slide, or flow
under various conditions.