SOIL SURVEY

LANDFOR MMajor Iandformsgenerally have predictable kinds of materials, topography ,drainage, and stability . Hence, these separations forma logical framework whe npreparing a soils legend and map . The landforms found in Yoho National Park wer eclassified according to the outline presented in Table 3 . This landorm classificationis modified from Fulton et al .(1974) and has tentatively been adopted by the Canad aSoil Survey Committee . Testing by soil survey groups throughtout Canada has resulte din more recent versions (CSSC 1976b) .Accordingly, this landform classification mayappear with some modifications in other soil survey reports .A veneer surface form as used in this report (Table 3) and as shown on th esoil maps, indicate a surficial deposit which masks little of the configuration of th eunderlying bedrock or deposit . It is generally assumed to be less than 2 m deep an dunless otherwise indicated, occurs over bedrock .A blanket surface form as used in this report and on the soil maps, indicate sa surficial deposit which subdues, but doesn't entirely mask the configuration of th eunderlying bedrock or deposit . A blanket is generally estimated to be between 2and 15 m thick . Unless otherwise indicated, a blanket deposit is underlain b ybedrock .Because the materials associated with specific landformsact as one of th esoil-forming factors, when a significant landform change occurs there is a concomiran tsoil change . The combinations of landforms and soilscape groups are presented i nTable 4 .TOPOGRAPH YTopography plays a very important part in the soil formation process and i salso one of the major considerations when planning for the use of an area . ThePark is located entirely in the Rocky Mountains and as such has a land surface whic his extremely variable, ranging from relatively level floodplains and gently slopin galluvial fans to steeply sloping colluvial slopes and high rugged mountain peaks .