SOIL SURVEY

-135--The steep slopes and the relatively unstable soils associated with the majorit yof the T01 map units result in very severe limitations for recreational and engineerin guses . Wetness, texture and slope cause moderate to severe limitations for most uses o nthe remaining T01 map units .VA - Vanguard Soilscape GroupPhysiographic Settin gWherever seepage or water accumulations at the surface occur in moraine sover an extensive enough area (greater than about 5 acres), that it can be shown o nthe map, these areas are designated as belonging to the Vanguard soilscape group .Areas large enough to be shown on the map are not frequent in Yoho National Park .Landform and Parent Material sThe Vanguard soilscape group generally occurs on morainal blankets an dthicker morainal deposits . The parent materials are calcareous, medium and coars etextured glacial till .EnvironmentVanguard map units occur at or near the bases of slopes and are usuall yfound below elevations of 1750 m a .s .l ., occurring in the montane and the lowe rportion of the subalpine vegetative zones .VA 1 Map Unit (Rego Humic Gleysols )This map unit is characterized by poorly drained soils on glacial till . Thesesoils are medium to coarse textured, generally contain less than 20% coarse fragments ,and are poorly to very poorly drained . They occur in seepage and groundwate rdischarge areas, and often there are numerous small creeks flowing over the landsurface . A thin organic layer at the soil surface is typical of these soils .