Description: In general, mixed lithologies can be depicted by combination of the appropriate symbols for main lithology and admixture. However, for practical reasons, the most common mixtures between siliciclastics and carbonates are treated here as a separate class.
The siliciclastic-carbonate mixture of this class must be homogeneous and the two main components must be present in approximately equal amounts. If these requirements are not met, combinations of separate symbols are to be used.