They are solid or liquid substances that are: (i) created or modified substantially by humans as part of an industrial or artisanal manufacturing process; or (ii) brought to the surface by human activity from a depth where they were not influenced by surface processes.
References
- Guidelines for Soil Description, FAO, 2006 (http://www.fao.org/3/a-a0541e.pdf).
GEO-1-6
They are solid or liquid substances that are: (i) created or modified substantially by humans as part of an industrial or artisanal manufacturing process; or (ii) brought to the surface by human activity from a depth where they were not influenced by surface processes.
References
- Guidelines for Soil Description, FAO, 2006 (http://www.fao.org/3/a-a0541e.pdf).