Geology Reference
In-Depth Information
100
()
a
Initial form at start of
postglacial period
50
0
100
()
b
Form after no cliff retreat
and 10,000 years of
basal accumulation
50
0
100
()
c
Form after 2,000 years of cliff
retreat and then 8,000 years
of basal accumulation
50
0
100
()
d
Form after 4,000 years of cliff
retreat and then 6,000 years
of basal accumulation
50
0
100
()
e
Form after 6,000 years of cliff
retreat and then 4,000 years
of basal accumulation
50
0
100
()
f
Form after 8,000 years of cliff
retreat and then 2,000 years
of basal accumulation
50
0
250
200
150
Distance (m)
100
50
0
Figure 7.8
Kirkby's modelled hillslope profiles for South Wales cliffs during the postglacial period. The model
assumed basal retreat of 20 mm/yr for the first 8,000 years and basal accumulation for the last 2,000 years.
Source:
Adapted from Kirkby (1984)
