Soils of the - Agriculture and Agri-Food Canada

TABLE 2
The relationship between classified soils and surf icial deposits (soils parent materials )
in the Langley-Vancouver map area
Morainal
(Glacial Till )
Deposits
Colluvial
Deposits
(>1 m thick)
Glaciofluvial
Deposits
Fluvial Deposits-
Deltaic
Sandy
Fluvial Deposits-
Floodplain
Fluvial Deposits-
Local Stream s
Silty or silty or silty or
Clayey
Sandy Clayey Sandy Clayey
Blaney Cheam Capilano Benson Blundell Dewdney Addington Eastcap Bates
Buntzen Hoover Columbia Neptune Crescent Grevell Alouette Hopedale Carvolt h
Burwell Kenworthy Defehr Seaview Deas Matsqui Annis Sardis Lickma n
Cascade Lions Errock Tsawwassen Delta Seabird Arnold Seymour McElvee
Devil Palisade Haney Embree Beharrel Ros s
Golden Ears Poignant Lynden Guichon Blackburn Si m
Langdale Roach Kilter Bonson Westlan g
Marion Sechelt Ladner Fairfiel d
Porpoise Mathews Grig g
Steelhead shallow McLellan Hallert
Strachan Colluvial Nicomekl Hammon d
Surrey
Sandel
Hatzi c
ôve Bedrock
Whonnock
Spetifore
Hazelwood
Vinod
Henderso n
Cannell
Westham
Hjort h
Grouse
Hollyburn
Sayres
Katzi e
Monro e
Neaves
Nive n
Pag e
Pell y
Pitt
Prest
Sturgeon
(iv)
source of the original sediment and the velocity of the streams . The topography is mostly gentl y
undulating to gently rolling . High groundwater tables are usual for at least parts of the year an d
flooding during freshet periods or after heavy, prolonged rain is common in some areas .
Fluvial fan deposits occupy only scattered areas on the uplands and lowlands of the map area bu t
are common in the mountain valleys . They usually occur where relatively swiftly flowing stream s
abruptly lose velocity and deposit part of their sediment load in a fan shaped pattern . Many are stil l
in the process of formation . The deposits are usually moderately to excessively stony and ar e
variable in texture . Most commonly however, they are coarse or moderately coarse . Topograph y
varies from gently to steeply sloping in the direction of stream flow .
(5) Glaciomarine deposits are common in Langley, Matsqui, Surrey and Maple Ridge Municipalitie s
below about 175 m elevation and occupy smaller areas elsewhere . Topographically, they vary fro m
undulating to rolling . They consist of massive, compact, very slowly permeable silty to claye y
sediments which have not been preloaded by glacial ice as is the case with morainal deposits .
These deposits, which were laid down in near-shore locations during glacial recession and subsequently
exposed through isostatic rebound, contain variable amounts (usually minor) of stones ,
cobbles and gravel incorporated from floating ice . Dark coloured (probably manganese and organic )
coatings are common in the subsoil along cracks and fractures and sea shells can be found in som e
locations . In the eastern part of the map area, a thin, silty eolian veneer sometimes covers the surface .
1 0