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In most successions of metamorphic rocks, those with reactive lithologies, such as mature pelites , make up only a small proportion of the rock mass.
There is no evidence for the superimposition of two entirely separate high-grade metamorphic regimes either in the calc-silicate rocks or in the associated pelites .
The latter sediments are covered by pelites and sandstones carrying marine invertebrate fossils and deltaic facies with a Glossopteris flora, which indicates an Early Permian age.
Foliations vary from grain-shape fabrics in quartzites and psammites, to a dominant crenulation cleavage in pelites , with intermediate rocks showing folded cleavage within a bed, and sometimes two cross-cutting cleavages.
A variety of sedimentary lithologies have been metamorphosed including pelites , psammites, quartzites and carbonates.
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