argillic horizon

views updated May 14 2018

argillic horizon A sub-surface B soil horizon that is identified by the illuvial (see illuviation) accumulation of silicate clays. The amount of clay necessary is defined in comparison with the quantity in the overlying eluvial (see eluviation) horizon, but is at least 20 per cent more. Cutans (clay skins) may be used to help identify an argillic horizon. It is at least one-tenth as thick as overlying horizons.

argillic horizon

views updated May 08 2018

argillic horizon Sub-surface B soil horizon that is identified by the illuvial (see ILLUVIATION) accumulation of silicate clays. The amount of clay necessary is defined in comparison with the quantity in the overlying eluvial (see ELUVIATION) horizon, but is at least 20% more. Cutans or clay skins may be used to help identify an argillic horizon. It is at least one-tenth as thick as the overlying horizons.

argillic horizon

views updated May 17 2018

argillic horizon Subsurface B soil horizon that is identified by the illuvial (see ILLUVIATION) accumulation of silicate clays. The amount of clay necessary is defined in comparison with the quantity in the overlying eluvial (see ELUVIATION) horizon, but is at least 20 per cent more. Cutans (clay skins) may be used to help identify an argillic horizon. It is at least one-tenth as thick as overlying horizons.