Geoscience Reference
In-Depth Information
Degraded debris slide
Valley-side tor
Boulder field
Incised gully/
debris flow track
Active lower slopes
(with colluvium/talus)
Rock face
Talus/scree
Talus apron
Colluvium
Colluvium
Tr ibutary
valley
Rotational slide
Principal
valley
Residual soil over
weathered rock
Buried soil or
weathered rock
Rapids
Debris slide
Rock slide
Alluvial fan
Flood plain and
river terraces
Figure 24.14
A mountain landsystem, identifying (1) cryonival zone of snow, ice and permafrost, (2) rock walls and rockwall
processes, (3) degraded slopes and former high-level valley floors and benches, (4) active lower slopes and (5) valley floor
system.
Source: Fookes et al. (1985)
Plate 24.9
The mosaic of exposed rockwalls, morainic ground and snow and ice zones which comprise the upper, cryonival
belt of the alpine landsystem in the Swiss Alps.
Photo: Ken Addison
