<p>The data was converted from the print representation to this linked-data form by
<a href='https://orcid.org/0000-0002-0693-1899'>Linda Gregory</a> assisted by <a href='https://orcid.org/0000-0002-3884-3420'>Simon
J D Cox</a>.</p>
This vocabulary is a machine-readable representation of the classifiers described
in chapter 9 Substrate, by R.C. McDonald and R.F. Isbell, in Australian soil and land
survey field handbook (3rd edn)
This vocabulary deals with materials and masses of earth or rock that do not show
pedological development. They are not soils, but typically underlie them.
This chapter deals with materials and masses of earth (see page 163) or rock that
do not show pedological development. They are not soils, but typically underlie them.
The substrate includes the R horizon and that part of the C horizon that shows no
pedological development (page 106), but excludes the solum, buried soil horizons (including
D horizons), and pans. The substrate beneath a soil profile may or may not be the
parent material of the soil.
The properties of the substrate should be described as objectively as possible. The
first group of properties refers to the material or substance in an intact state,
as would be seen in a hand-sized specimen without cracks. Such properties serve to
identify the type of rock, such as sandstone, or unconsolidated material, such as
clay. A second group of properties comprising spacing of discontinuities, alteration,
and mass strength refers to substrate masses. These require observations of areas
of greater dimensions. Types of substrate mass are classified mainly according to
their inferred origin. Examples are alluvium, parna, ferricrete and saprolite.
The substrate should be observed at the point of the soil profile observation or as
close to it as may be practicable. Large vertical exposures of the substrate may reveal
the spatial variation of substrate features.