oa Civil Engineering = Siviele Ingenieurswese - The genesis and distribution of expansive soil types in South Africa
In Southern Rhodesia the old granite and gneiss did not, in general, give rise to expansive soil types, although certain sandveld conditions were troublesome in road construction. The extensive greenstone schists of the Primitive or Basement Complexes, such as occurred at Bulawayo, Gwelo and the Goldfield Belt north of Salisbury, had given rise to expansive soils. Epidiorite schists could be seen, in areas of sparse topsoil, to be slickensided.
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