® Ontario ontario institute of pedology - Agriculture and Agri-Food ...

Thwaites soilsThwaites soils are well-drained soils developed in variable depths of silt loam overcalcareous, lacustrine clay. They occur chiefly in Brethour and Pense Townships, along the edgeof the Blanche River valley . The topography is moderately sloping,, except for some steep slopesalong dissected stream valleys. Thwaites soils, when uncultivated, are classified as Podzolic GrayLuvisols . However, when cultivated, they are usually Orthic Gray Luvisols .Timiskaming ComplexThe Timiskaming Complex is composed of Haileybury, Hanbury, New Liskeard and Milbertamineral soils, as well as organic soils and rock outcrop . Drainage is variable and the topographyis mainly moderately to steeply rolling .Twin Falls soilsTwin Falls soils are very limited in extent on the Ville-Marie sheet, occurring at only onelocation along the western boundary of the sheet. They are very poorly drained soils that havedeveloped on fibric organic materials, up to 40 cm thick, over mineral soil composed of fine sandyoutwash . Topography is level to depressional . They are classified as Orthic Humic Gleysols .Wabi soilsWabi soils are well-drained soils, developed on noncalcareous, stony loam till. They occuron moderately rolling ridges in Harley :and Armstrong Townships . Surface textures may be loamor sandy loam, and surface stones and boulders are common. Wabi soils are usually classified asOrthic Humo-Ferric Podzols .Wendigo soilsWendigo soils arewell-drained soils developed fromwater-worked, stratified, medium to finesands, which occasionally contain lenses or layers of fine to medium gravel. They occur on gentlyrolling terrain . Three phases have been mapped ; Wendigo sand, Wendigo sandy loam and Wendigogravelly sand . They are classified as Orthic Humo-Ferric Podzols .Withington soilsTwo small areas of Withington soils have been mapped along the western boundary of theVille-Marie sheet . They are imperfectly drained soils, developed over acidic, fine sand outwashmaterials . They occur on topography ranging from level to gently sloping . They are usuallyclassified as Gleyed Ferro-Humic Podzols.