102995-10 Permissible change request

Soil Origin
It is often difficult to accurately determine the origin
of a soil. Soils can generally be classified as:
•   Residual soil - derived from in-situ weathering
    of the underlying rock;
•   Transported soils - formed somewhere else
    and transported by nature to the site; or
•   Filling - moved by man.

Transported soils may be further subdivided into:
•   Alluvium - river deposits
•   Lacustrine - lake deposits
•   Aeolian - wind deposits
•   Littoral - beach deposits
•   Estuarine - tidal river deposits
•   Talus - scree or coarse colluvium
•   Slopewash or Colluvium - transported
    downslope by gravity assisted by water.
    Often includes angular rock fragments and
    boulders.




                                                           July 2010