Precambrian coeval basic rocks metamorphosed equivalent to low grade amphibolites fecies, have been granized along their fractured zones. Biotite selvages/surmicaceous endaves are formed as a result of the advent of potash rich solutions with the continuation of elevated temperature. Sufficient supply of metasomatising material and fractured zones have facilitated the complete transformation of the metabasic rocks into granodiorite leaving a biotite rich zones in the Bramhajoni Hill,Gaya,Bihar.
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Cite this article:
Kuity (1991). Formation Of Biotite Selvages In Granitic Rocks, District- Gaya, Bihar. Journal of Ravishankar University (Part-B: Science), 4(1), pp.67-75.