Geoscience Reference
In-Depth Information
Fig. 13.5
Entisol, suborder
Psamment. A very thin ochric
epipedon, diffi cult to
ascertain as a recognizable A
horizon owing primarily to its
very low humus content,
exists during its early stage of
development. Unconsolidated
sand remains at depths below
the slowly developing A
horizon (WRB:
Regosol-Arenosol)
Fig. 13.6
Histosol, suborder
Fibrist. At the
top
fi bric
epipedon with the dominance
of undecomposed plants
residues gradually transforms
at greater depths into peat
(WRB: Histosol)
