4. Pedofeatures
They are pedofeatures that occur in the matrix, but adjacent to natural surfaces (generally voids).
They can be the impregnative, depletion or fabric type.
The types that can be distinguished are the same as in the coatings.
They are often from:
accumulation of carbonates
accumulation of Fe compounds
accumulation of Mn compounds
depletion of Fe/Mn compounds
