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Common clays are usually mixtures of clay minerals such as illite , smectite, and kaolinite, together with fine silica and other minor constituents.
In this case the surrounding sediment matrix is dominated by detrital quartz and illite along with various other clay minerals.
The clay is composed of illite and kaolinite, with minor amounts of chlorite and smectite.
Clay minerals are mainly illite and chlorite, with only traces of smectite, vermiculite and kaolinite.
The clay minerals illite , chlorite and montmorillonite were identified within the palaeosols by X-ray diffraction.
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