Abstract
This chapter discusses the textural pedofeatures, its development, and occurence. Textural pedofeatures are characterized by a difference in grain size with the adjacent groundmass and comprise coatings, infillings, and intercalations. Clay illuviation was one of the first pedogenic processes to be recognized in micropedology. This process is associated with the removal of clay from upper horizons and its redeposition as clay coatings and infillings in deeper horizons. The correct recognition and description of clay coatings is the key to a precise interpretation of genesis and properties of the horizons and soils under consideration. Illuvial clay coatings are often difficult to recognize in the field, but in most cases they are easily distinguishable under the microscope. So far, micromorphology is the only reliable method to validate clay illuviation and it also provides additional information about the conditions of formation of the various textural illuvial features.
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