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(20 to 30 cm) . Depth does, however, depend on the extent of mixing
and injection of organic matter and parent material into the solum
as this can greatly increase the depth (see profile ZT16) . Soils
developed on sandy aeolian deposits are generally deep (1 m or more)
and have the deepest B horizons of Brunisolic soils found in the area .
It is interesting to note that site T6, located at Nahanni Hot
Springs, has a well developed, deep B horizon . This is probably
a local situation occurring around the Hot Springs where the soil
temperature increases by depth, being 14 ° C at the surface (2 .5 cm
depth) and 17 .5 ° C at a depth of 1 m, resulting in a slightly more
favorable soil climate for soil development .
The pH of Eutric Brunisols is 5 .5 or higher with the exception
of profile T6 .
Perennially frozen soils also have a very strongly
acid solum in spite of the fact that the reaction of the parent
material is neutral or mildly alkaline .
The pH of Dystric Brunisols
is 5 .5 or lower . These soils have developed on strongly to very
strongly acid parent materials (pH 4 .5 - 5 .5) resulting in an
extremely acid (pH less than 4 .5) solum .
Soils affected by cryoturbation and
denoted by an asterisk have
very typical physical and chemical characteristics . As a result
of cryoturbation,
the horizons are distorted, mixed with other
horizons or, in some cases, the whole horizon is displaced or injected
into another horizon .
The structure of the surface horizon is
typically granular to shotty, and in some cases, a platy structure
was also noted .
A typical pumice-like macro-structure (great amounts of