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Memoirs of the Geological Survey of India

1900

In the summer of 1897 I was able to devote a month towards the examination of some of the interesting features presented by this group in the immediate neighbourhood of Salem, whilst the following field season was devoted to a systematic survey of the little province of Coorg on the Western Ghats, where, with the help of Dr. [...] Oldham, W. King, R. B. Foote and P. Lake, most of which have been published in the Memoirs and Records of the department,' As at the time of the issue of these publications provision had not been made in the department for microscopic examination of the rocks, the wide prevalence of the pyroxenes, and especially of the rhombic forms, was not noticed, the dark mineral in the rocks being generally r [...] Following also the theories then prevalent as to the nature of the Archaean crystalline rocks, most of the authors who described the geological features of Madras regarded the gneissose and the banded structures as evidence in favour of considering the crystalline rocks to be the results of the metamorphism of sediments. [...] John's Churchyard, Calcutta, and when it was found that the tombstone was made of the same hypersthene-granite (which was at the time thought to be a new type of rock), the name charnockite was suggested for it in honour of the man who was the unconscious means of bringing the first specimen of this interesting rock to the city which ultimately became the capital of India. 2 In the same year (1893 [...] Their constituents are arranged parallel to the sides of the veins ; but they show no sign of crushing, and this linear arrangement of the constituents must, as in the case of the charnoc- kite of the same mass, be referred to the results of pressure during consolidation.
agriculture environment
Pages
158
Published in
India
SARF Document ID
sarf.100011
Segment Pages Author Actions
Frontmatter
i-iv unknown view
Introduction
119-121 unknown view
Part I. Petrography of the Series
122-202 unknown view
Part II. Origin of the Charnockite Series
203-253 unknown view
Index
1-10 unknown view
Backmatter
i-ix unknown view

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