They are indicators that other vertic characteristics, such as wedge-shaped peds and surface cracks, may be present. This symbol is used to indicate an accumulation of silicate clay that has formed and subsequently translocated within the horizon or has been moved into the horizon by illuviation, or both. At least some part should show evidence of clay accumulation in the form of coatings on surfaces of peds or in pores, or as lamellae, or bridges between mineral grains. It should not be used to indicate a transitional horizon. This symbol is used to indicate genetically developed layers that have a combination of firmness, brittleness, very coarse prisms with few to many bleached vertical faces, and commonly higher bulk density than adjacent layers.
Some part is physically root restrictive.
This symbol is used to indicate the accumulation of gypsum. Conventions for using letter suffixesMany master horizons and layers that are symbolized by a single capital letter will have one or more lower case letter suffixes. More than three suffixes are rarely used. The B horizon that is gleyed or that has accumulations of carbonates, sodium, silica, gypsum, salts more soluble than gypsum, or residual accumulation or sesquioxides carries the appropriate symbolg, k, n, q, y, z, or o. The Arabic numerals used for this purpose always follow all letters.