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GEOLOGICAL SURVEY OF INDIA.
Ceylon. H S. Washington, R. J. Fabry, J. T. Donald.
Shevaroy Hills. H. S. Washington.
Mg 0
50
45
40
SiO2 %
G. S. 1., Calcutta.
VARIATION DIAGRAM OF THE CHARNOCKITE SERIES.
UNIV. OF CALIFORNIA
O