SOIL SURVEY

-137-Table 50 . Brief description of the pedon chosen to characterize the VA 1 map unit .HorizonDepthEst . Coarse H Organic(cm)Moist Color Fragments Texture(CaCI2)( M at(%)/cj rOh 17-0 dark reddish brown 7 .2 -Ahg 0-14grayish brown andblack< 5 silty clay loam 7 .0 3 1Bg 14-32 yellowish red - silt loam 7 .2 4 . 7Ckg 32+ pale olive - loam 7 .5 -Humic Gleyso lThe wetness and organic surface associated with this map unit results in ver ysevere limitations for most recreational uses .WI - Wiwaxy Soilscape GroupPhysiographic Setting (Figure 64, page 100)Members of this soilscape group occur on fluvial fans in the upper subalpin ezone . In general these map units are of limited areal extent, and are not frequen twithin Yoho National Park, but the contrasting nature of soils and vegetatio nnecessitates their cartographic separation even though small .Landform and Parent Material sThe Wiwaxy soilscape group occurs on fluvial fans and level fluvial plains .The materials are coarse textured and may have a medium textured surficial deposi toverlying the coarse materials .Environmen tThe Wiwaxy soilscape group occurs on well and moderately well drainedmeadows in the upper part of the subalpine vegetative zone, generally 100 to 20 0m below the tree line . The meadows appear to be related to cold air drainage o r"frost pockets" .