The composition of soil provides evidence of the soil's source. The soils of the Eastern Townships are mainly composed of till deposits: a mixture of large stones, rocks, gravel, and sand, which was transported and then deposited by glaciers. Erosion combined with freezing, thawing, and the addition of a layer of organic matter have transformed these deposits into soil. Along rivers, soil is mostly clay.
Soils of the Eastern Townships.
Source: Info-sols.ca
