Geology Reference
In-Depth Information
Inselberg
Inselberg
range
Wash depression
Wash divide
Wash depression
Fine sand bed
rainy season
dry season
Wash
ramp
Rock
pavement
Corestone
Basal
knobs
Shield
inselberg
Basal weathering
surface
Latosol
sheet
Figure 15.2
Double planation surfaces: the wash surface and the basal-weathering surface.
Source:
Adapted from Büdel (1982, 126)
Jessen's model (1936)
Ollier's model (1959)
Stage 1
Initial surface
Initial surface
Stage 2
Valley deepening
Deep weathering forming thick saprolite
Saprolite
Valley deepening
and widening
Stage 3
Valley
cutting
Valley
cutting
Stage 4
Valley widening
Pediment
cutting
Pediment
cutting
New surface with tors superposed
on incipient inselbergs
Stage 5
Inselberg reduction
Figure 15.3
Theories of etchplanation.
Source:
Adapted from Jessen (1936) and Ollier (1995)
