1919. ] The Sixth Indian Science Congress. clxxv 
prepared to go further than Mr. Middlemiss to meet Dr. 
Smeeth, for I have long ago recognised certain quartzites in 
inghbhum as crushed vein- quartz and certain micaceous 
schists in Chhindwara as crushed gneisses, whilst I have been 
compelled to ae ine as autoclastic every Dharwarian conglom- 
erate I have ever seen (not a numerous) except one in the 
Champaner abies near Jhaban in the Panch Mahals.' More- 
over, at one place in the Bala iat district Mr. Burton and I 
found it impossible to decide, even after chemical tests, whether 
or acid igneous rocks; and, of course, | accept as metamor- 
phosed su ethaege rocks alininlt all epidioritic rocks and horn- 
blende-schis 
Fur Gace work carried out in Singhbhum last winter 
renders it likely that the potstones and other magnesian 
schists in the Dharwars are merely metamorphosed ultra-basic 
rocks. 
But, with these exceptions, the general eee of evidence 
Sedimentary members #PPears to me to favour the view that 
seh Draven. the majority of the lahat phyllites, 
ica-schists, and quartzites o 
Dharwars are metamorphosed sediments ; and although I was 
main, a etamorp. 
part by contact-metamorphism and in part by lit par lit nee 
tion of acid igneous material. : In my brief visits 
Sandur hills, Mysore, and Goa, that is, to parts of India “ 
which Dr. Smeeth’s views more particularly apply, I saw w phyl- 
lites and quartzites that appear to me to be indistinguishable 
from the presumed sedimentary Die of the Central Pro- 
vinces and Singhbhum 
As regards the relationships of the Dharwars to the 
a: oe ental gneisses ’’’, all the evi- 
oo ee pabeene than the dence I have seen forces me to the 
rng acct 2 wey conclusion as meeth, viz. 
that the Dharwars are the S alddek rocks wherever they occur, 
and that the associated gneisses an ssose 
Sper gous in their relationships. The jeueiein are obscured 
by debris, but, where visible, often show inclusions of the 
Dharwar rocks in the gneiss or granite (e.g. in Singhbhum and 
granite in the Dharwars (e.g. at Jothvad). At other times the 
junction is a shear junction characterized by autoclastic rocks 
1 W. T. Blanford, Mem. G.S.I., VI, p. 41 (1869). 
2 Rec. G81, XLV, p- 102, (1916). 
