ahorizon

См. также в других словарях:

• Ahorizon — A horizon n. In ABC soil, the uppermost zone of soil, containing humus; topsoil. Also called zone of leaching. * * * …   Universalium

• B-horizon —    Illuvial horizon in which soluble material from the overlying Ahorizon has been deposited [16] …   Lexicon of Cave and Karst Terminology