illuviation

During this, they react with the water (illuviation) to become oxidised.

They have subsurface horizon formation but show little eluviation and illuviation.

The process of deposition of illuvium is termed illuviation.

This layer accumulates iron, clay, aluminium and organic compounds, a process referred to as illuviation.

A soil horizon accumulating leached and eluviated materials is referred to as a zone of illuviation.

These sub-processes include mobilisation, eluviation and illuviation.

The Bt horizon has an irregular or broken upper boundary resulting from the tonguing of bleached soil material into the illuviation horizon.

The Alfisols have a subsurface ("B") horizon characterized by phyllosilicate clay accumulation (suggesting illuviation of such clay from above).

Clay skins are also called argillans, and soil horizons with sufficient clay illuviation are termed argillic horizons.

Cutans are the modification of the soil texture, or soil structure, at natural surfaces (particle, pore, or ped) in soil materials due to illuviation.

The sesquioxides are translocated from the A Horizon, a zone of out-washing, to the B Horizon, a zone of illuviation.

Clay Cutans inherently indicate illuviation and therefore may indicate the presence of a petroleum seal in an underlying layer if silica had been transported to that depth.

The acidic O horizon, along with rainfall patterns that are similar to that of the moister grasslands, also promotes the illuviation of oxides of aluminium and iron.

Illuvial deposits of clays, oxides, and organics accumulate in subsoil as distinctive soil horizons classified as "B horizons" or "zones of illuviation".

In addition, the top facets lose materials such as mineral salts when these are washed out by rain (eluviation), while the bottom facets gain materials when these are washed in (illuviation).

During biostasy, abundant and regular precipitation induces strong pedogenesis characterized by chemical alteration of parent material and intensified eluviation and illuviation of soil minerals within the surface soil and subsoil layers (the solum).

In soil science, eluviation is the transport of soil material from upper layers of soil to lower levels by downward precipitation of water across soil horizons, and accumulation of this material (illuvial deposit) in lower levels is called illuviation.

An albeluvisol in the FAO World Reference Base for Soil Resources is a soil with a thin, dark surface horizon on a bleached subsurface horizon (an albic horizon) that tongues into a clay illuviation (Bt) horizon.