SOIL SURVEY

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-62-BG 3 Map Unit (Orthic Regosols )This map unit is characterized by those soils, with little horizon developmen tand containing 20 to 50% coarse fragments, which occur on colluvium . The depth tobedrock is generally greater than 50 cm, but is often less than 200 cm . Snow avalanchingis sometimes associated with parts of the BG 3 map unit and is shown on th emaps as BG 3 +A where the avalanching occurs on less than about 25% of the mapunit and is restricted to well defined chutes, or as BG 3A where avalanching occur son greater than 25% of the map unit . These soils do not usually have an Ah horizo nTable 13 . Brief description of the pedon chosen to characterize the BG3 map unit .Dept hEst . CoarseHorizon(cm)Moist ColorFragment s(%)L 2-0 consists mostly of needle sABk 0-12 light brown 25Ck 12-70 yellowish brown 85R 70+Orthic Regoso lpH OrganicTexture (Ca CI2 ) Matte r(gravelly 6silt loam .9 6 .6very7 . 2gravellysilt loamThe very stony nature of these soils and the steep slope generally associate dwith this map unit result in severe to very severe limitations for most recreational andengineering uses .BG4 Map Unit (Cumulic and Orthic Regosols)This map unit is characterized by those soils which have developed on sno wavalanche chutes having vegetative communities characterized by alders and/o rwillows and forbs . The depth to bedrock of these soils is characteristically greate rthan 50 cm, but in many mapped areas it may be less than 200 cm . A well developednon-turfy, dark colored Ah horizon is found on these soils .
-63-Figure 28 . Site of the pedon chosen to characterize the BG 3 map unit .Figure 29 .Orthic Regosol soil chosento characterize the BG 3map unit . The loos eappearance is typical .
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t, Agricultur eCanad aSOIL SURVEYof
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SOIL SURVEY O FYOHO NATIONA LPARK,
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(Contents - cont . . )PageFIGURES1
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(Contents - cont . . . )TABLES (con
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(Contents - cant . . . )TABLES (con
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Gleysolic and Organic soils occur i
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PREFAC EThe soil survey of Yoho Nat
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How to use this repor tThis report
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PARTIGENERAL DESCRIPTION OF THE ARE
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-3-The Kicking Horse River and Kick
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-5-serves hikers in the Lake O'Hara
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-7-mainly in the Cataract Brook - L
Page 29 and 30: figure 3 . A cirque; typical of man
Page 31 and 32: -11-Glacial processes are not howev
Page 33 and 34: -13-Figure 6 . Drainage systems of
Page 35 and 36: -15-_.iure 7 . Gentle gradients in
Page 37 and 38: -17-The effect of altitude on clima
Page 39 and 40: GOLDE NPR ECIP nTAT IO NRAIN + SNO
Page 41 and 42: Table 2 . Comparison .' of mean mon
Page 43 and 44: -23-VEGETATIO NGeneral Vegetation P
Page 45 and 46: -25-The interaction of these soil-f
Page 47 and 48: -27-profile development is frequent
Page 49 and 50: -29-PART I IMETHODOLOGYMAPPINGA goo
Page 51 and 52: Figure 13 . Oblique photo showing t
Page 53 and 54: Figure 15 . Oblique photo showing t
Page 55 and 56: -35-~ ♦ YOHO NATIONAL PAR K[D]Ami
Page 57 and 58: -37-Table 3 . An outline of the loc
Page 59 and 60: -39-The topography of each mapping
Page 61 and 62: -41 -must be treated as an independ
Page 63 and 64: -43-FIELD TEST S1 . Bulk Density; b
Page 65 and 66: -45-are calcareous, stratified, med
Page 67 and 68: -47-Organic Landform sNorco (NA) is
Page 69 and 70: -51 -LEGENDParent material.colluviu
Page 71 and 72: -53-Table 7 . Key criteria differen
Page 73 and 74: -55-BC2 Map Unit (Orthic and Rego G
Page 75 and 76: -57-Table 10 . Brief description of
Page 77 and 78: ure 24 . This photo shows the huge
Page 79: igure 26 . Site of the pedon chosen
Page 83 and 84: - 65-CLI.Figui 30 . Site of the ped
Page 87 and 88: L-69-r_ -, _ 1 4Figure 35 . Site of
Page 89 and 90: Figure 37 . Site of the pedon chose
Page 91 and 92: -73-Landform and Parent Material sT
Page 93 and 94: -75-The silty surface texture, slow
Page 95 and 96: -77-material and/or shallowness (of
Page 97 and 98: Figure 44 . Site of the pedon chose
Page 99 and 100: -81-HR1 Map Unit (Degraded Eutric B
Page 101 and 102: -83-in the solum, but may exceed 50
Page 103 and 104: -85-KI - Kicking Horse Soilscape Gr
Page 105 and 106: -87-Silty surficial textures provid
Page 107 and 108: -89-Wetness, texture, and potential
Page 109 and 110: -91 -Table 27 . Brief description o
Page 111 and 112: Site of the pedon chosen to charact
Page 115 and 116: -97-NI1 Map Unit (Lithic Orthic Eut
Page 117 and 118: -99-Figure 62 . Site of the pedon c
Page 119 and 120: -101 -EnvironmentThe Ogden soilscap
Page 121 and 122: -103-Table 33 . Brief description o
Page 123 and 124: -105-Table 34 . Brief description o
Page 125 and 126: -107-Figure 70 . Site of the pedon
Page 127 and 128: Figure 73 . Degraded Eutric Bruniso
Page 129 and 130: _ • _- - ~ . -. n- C . 1 - r IFig
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-113-YpiFigure 76, Site of the pedo
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-115-Figure 78 . Site of the pedon
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-117-OP 1 Map Unit (Cumilic Regosol
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-119-OT - Otterhead Soi Iscape Grou
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ure 82 . Site of the pedon chosen t
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-123-Table 44 . Key criteria differ
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-125-SI2 Map Unit (Lithic Humo - Fe
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-127-Landform and Parent Material s
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-129-Table 47 . Brief description o
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Figure 91 . Site of the pedon chose
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-133-Environmen tzones .The Tocher
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-135--The steep slopes and the rela
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Figure 97 .Site of the pedon chosen
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-141 -EnvironmentThe Watchtower soi
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-145-The stoniness and periodic sno
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Brief description of the pedon chos
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-150-late snowmelt areas or streams
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-152-The soils have been rated acco
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-154-Table 58 . Guides for assessin
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-156-Table 60. Guides for assessing
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-158-Table 62. Guides for assessing
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-160-Table 64 . Guides for assessin
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-162-Table 66 . Frost design soil c
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Table 67r Interpretations for selec
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(cont . )Table 67: Interpretations
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-168-(cont . )Table 67 : Interpreta
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-170-GLOSSARY'AASHO classification
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-172-Clay films (skins) - Oriented
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-174-Field capacity - The percentag
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-176-Humification - The process by
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-178-Mechanical analyses - See part
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- :180-Permeability, soil - The eas
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-182-Slump - A landslide characteri
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-184-organic carbon, or both .BC -R
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-186-Granular - More or less rounde
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-188-Unified Soil Classification Sy
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-190-Bei I, C .E . 1966 . An ecolog
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-192-Hutchinson, D . E . 1976. Reso
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-194-Soil Research and Plant Resear
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-196--Appendix A :Selected chanical
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Appendix BtEngineering test data fo
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Appendix B : Engineering test data
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Appendix B : Engineering test data
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-204-Appendix D :Common names and t
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-206-HERBS (cont )Common Name sCow
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-208-MOSSE SCommon Name sCladina mi
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