Geoscience Reference
In-Depth Information
20m
Upstream
Downstream
Decreasing
clay content
from the
bottom to the
top of the band
Banded B
horizon
Fig. 8.10
Organization of horizons in bands (Legros 1975, 1976). The arrows represent the
oblique circulation of water and brown ferric clay. Actually the bands are often more numer-
ous. For example, they may number 10 or 20.
8.4
ECOLOGY AND DURATION OF PEDOGENESIS
8.4.1 Location of Luvisols in Europe
Soils with vertical textural differentiation are very well represented in
Europe. Figure 8.11 (Jamagne and Begon 1984) gives their distribution
while distinguishing different subtypes.
Fig. 8.11
Distribution of leached soils in Europe
(Jamagne and Begon 1984). With: orthic =
typic; gleyic = with redox features; Albeluvisols: Luvisols with a specially white and impover-
ished E; dystric = acid; Planosols = with abrupt A/B boundary.
