argillic horizon

What is argillic horizon?

argillic horizon meaning in Soil Science terminology / glossary / dictionary is:
A mineral soil horizon that is characterized by the illuvial accumulation of phyllosilicate clays. The argillic horizon has a certain minimum thickness depending on the thickness of the solum, a minimum quantity of clay in comparison with an overlying eluvial horizon depending on the clay content of the eluvial horizon, and usually has coatings of oriented clay on the surface of pores or peds or bridging sand grains.

 

reference: Soil Science Society of America