The B horizon is a mineral soil layer which is strongly influenced by illuviation.    From Wordnik.com.  [Soil] Reference

The deposition of fine mineral particles or dissolved substances in a lower soil layer is called illuviation.    From Wordnik.com.  [Soil] Reference

Generally, these horizons result from the processes of chemical weathering, eluviation, illuviation, and organic decomposition.    From Wordnik.com.  [Soil] Reference

Good drainage enhances an number of pedogenic processes of illuviation and eluviation that are responsible for the development of soil horizons.    From Wordnik.com.  [Soil] Reference

The most distinguishing characteristics of this soil type are the illuviation of clay in the B horizon, moderate to high concentrations of base cations, and light-colored surface horizons.    From Wordnik.com.  [Soil] Reference

Common characteristics of recognition include immature development of eluviation in the A horizon and illuviation in the B horizon, and evidence of the beginning of weathering processes on parent material sediments.    From Wordnik.com.  [Soil] Reference

B - mineral horizon that shows little or no evidence of the original rock structure and which has been altered by oxidation, and illuviation (addition of minerals, clays, and organic matter from the A horizon).    From Wordnik.com.  [Recently Uploaded Slideshows] Reference