Distribution
A striking fact is the very wide distribution of rocks of this group in the southern hemisphere; but they, or rocks very similar to them, occur in Norway, France, Sweden, Germany, Scotland and North America, though in these countries they have been mostly described as pyroxene granulites, pyroxene gneisses, anorthosites, &c. They are usually of Proterozoic age (late Precambrian).
In India they form the Nilgiri Hills, the Shevaroys, the Biligirirangan Hills and part of the Western Ghats, extending southward to Cape Comorin and reappearing in Ceylon.
The variety called Green ubatuba is found in Brazil.
Read more about this topic: Charnockite
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