Geoscience Reference
In-Depth Information
Figure 10.7
Successive stages of surface wetting and surface change and their interactions with runoff development on shale
badlands (from work on the Dinosaur Badlands, Alberta, Canada by Hodges and Bryan, 1982).
previous chapter). Conversely, the sands were less eroded
than the clays, in part because of the crust, in part due
to density differences and in part due to lower aggregate
stabilities in the clay.
Interbedding of different lithologies can produce signif-
icantly different runoff and erosion responses over very
slope forms in badlands (Figure 10.7). Campbell (1997)
produced a generic model of slope response, where sand-
dominated bedrock surfaces pass from splash- to interrill-
and then rill-dominated surfaces, often within a space
of a few tens of centimetres to metres. Bentonitic mud-
stones, on the other hand, are dominated by piping and
