Geoscience Reference
In-Depth Information
Table 4.16 Contd...
quartzi
With much quartz
rhod(o)
Dark red colour
sal
With a salic horizon
sapro
Decomposed plant fibres
sombri
Dark horizon
sphagno With sphagnum moss
sulf(o)
With sulphides or
torr(i)
Moisture regime of torric type
their oxidized products
ud(i)
Moisture regime of udic type
umbr
With an umbric epipedon
ust
Moisture regime of ustic type
verm(i)
Mixed by animals, earthworms
vit(r)(i)
Presence of glass
xer(o)
Moisture regime of xeric type
In the above table, an expression such as 'aqu(i)' means that both 'aqu' and 'aqui' can be found as
the expression defining the taxa in the system.
It seems as though the entire vocabulary is drawn upon to define
precisely the properties of the taxa at this level.
Subgroup
4.3.4
Examples of Identification of Taxa
Let us analyse this name. It corresponds to a Frigid Dur-orth-od. It is
analysed from right to left (ยจ) and is explained as indicated below
(Table 4.17).
First example: Frigid Durorthod
Table 4.17
Analysis of the term 'Frigid Durorthod'.
Order
Suborder
Great Group
Subgroup
od
orth
Dur
Frigid
Spodosol identified
This Spodosol has
This Orthod
This Durorthod was
by a spodic horizon.
typical horizons.
exhibits an
observed in cold
Cf. Table 4.14
Cf. Table 4.15
indurated horizon.
climate. Cf.
Cf. Table 4.16
Table 4.13
Thus we have a Podzol of cold climate; it has an indurated B
horizon.
This is broken up to give Vitric Melan-ud-and. Let us analyse this term
from right to left (Table 4.18).
Second example: Vitric Melanudand
