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charnockite
Charnockite is applied to any orthopyroxene-bearing quartz-feldspar rock, composed mainly of quartz, perthite or antiperthite and orthopyroxene (usually hypersthene) formed at high temperature and pressure, commonly found in granulite facies metamorphic terrain, as an end-member of the ''charnockite series''.〔Classification of Igneous Rocks, 2nd ed., 2002, by R. W. Le Maitre et al.〕
==Charnockite series==
The charnockite suite or series is a particularly widespread form of Granofels, Granofels are one of the few non-foliated rocks to form under relatively high temperatures and pressures. This combination is generated only deep in the crust by tectonic forces that operate on a grand scale, so granofels is a product of regional, rather than contact, metamorphism. It is formed mostly from the granite clan of rocks, or occasionally from thoroughly reconstituted clays and shales. It is of wide distribution and great importance in India, Ceylon, Madagascar and Africa. It was named by geologist T. H. Holland in 1893 after the tombstone of Job Charnock, the founder of Calcutta, in St John's Church in Calcutta, India, which is made of this rock.
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