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Charnockite, St. Thomas Mount
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Charnockite, St. Thomas Mount, located to the south of the Chennai city, in Pallavaram suburb, Tamil Nadu, is a characteristically profuse exposure of quartz–feldspar–hypersthene rock, illustrated by occurrence of two pyroxene facies metamorphism.〔(【引用サイトリンク】title= Charnockite, St. Thomas Mount )〕
The name "Charnockite, St. Thomas Mount" originated from the use of the rocks quarried from a central band in the St.Thomas Mount for the tombstone of Job Charnock, the founder of Kolkata in 1679. Several incidents in Charnock’s life are linked to Charnockite rock, Chennai city (formerly Madras) and the St. Thomas Mount.〔〔
==Geography and topography==
Charnockite rock series is an ancient formation, similar to granite, which has intruded into igneous rocks. It is found not only in St. Thomas Mount but also extends south of the Chingleput in Tamil Nadu. It is also traced to the Nilgiri hills with southern trend extending to the Malabar district, and former feudal states of Cochin and Travancore, princely towns in Kerala. It rises further above the sea level to form the great mass of Sri Lanka (Ceylon). The massive formations are more in the form of plateau (some of them at elevations between and that facilitates formation of lakes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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