cxcviii Journal of the Asiatic Society of Benyal. [N.S., XIII, 



_ « 



Thus the evidence is conflicting. Whilst general conclusions that 

 have great weight are in favour of the younger age of the Dharwars. 

 the particular section given above might be held to prove just the 

 contrary. 



Only, I think, by looking upon the Hosur gneiss as a rock that 

 has passed through (it may be) several vicissitudes of solidification 

 and plutonic remelting without ever having developed much intru- 

 sive motion as regards the formations above, can the above conflict- 

 ing testimony be harmonised." 



Such was the somewhat inconclusive view I had of tho Dharwar strips 

 in Salem at that time. I was prepared for a liberal interpretation of the 

 nature of the unconformity at their base, but no suspicion directed against 

 the then received explanation of their sedimentary or sub-aerial origin had 

 entered my thoughts. 



Well, gentlemen, the new interpretation of this Dharwar problem by 

 the Mysore Geological staff has now been before us for some years, and 

 presumably it is being constantly tested on the ground, and in due course 

 the full data in support of it, accompanied by accurate drawings, photo- 

 graphs and detailed plans on an adequate scale will likewise be laid before 

 us and before the geological world. It is a matter of considerable impor- 

 tance that these (especially the drawings and photographs) should be pro- 

 vided, for so far I think I am right in saying that no graphic representa- 

 tion of these extraordinary wholesale transformations of granites quartz- 

 porphyries and other igneous rock types, into schists, conglomerates, 

 limestones and quartzites, has as yet appeared from the pencil of any of 

 those responsible for the statements. Otherwise I am afraid there will 

 always be a feeling of doubt and questioning in the minds of many. 



Meanwhile in this short address it is no part of my desire or intention 

 to questJOQ them. Geology is not a science whose results can be settled 

 as by a debating society. I confess, however, that I should verv much 

 like to question the rocks themselves, once more again,— to go straight to 

 the fountain-head so to speak, and help myself to the arguments and 

 facts at first hand-but unfortunately one cannot b^ in more than one 

 place at a time, and I have other duties to attend to. 



It has nevertheless, occurred to me that, whilst one may perhaps be 



permitted to suspend judgment as regards these South Indian rocks, un- 

 til the long awaited data, m full, are kindly vouchsafed us bv the Mvsore 

 geologists, it might not be amiss to take into consideration certain other 

 areas of Archaean rocks that have recently been under exploration bv the 



Slj.1 ^ fVey .f f r ^ ia - and see if the y »how a similar or different 

 tendency ,n the matter of mterpreting the facts discovered. Manv of these 



tn?J Q L me K nder ™y own observation, and I have some claim 'therefore 



nn3 a A S H T? 6 ^^ first hand - In the Ce n«™l Provinces, in Raj- 

 S£ on £ih n State in Bombay surveys have recently been in pro- 



tfe laStwn *nT r °? 3 -, ? f thM0 af8as ' l have personal knowledge of 

 the last two and particularly of Idar State 



trvina tn 1 fln„^ h ! V !u f0Und ^^ U P & P ainSt ft g r6afc "»anv difficulties in 



of Z W« ? 5 e r?T Sis ° f the wonderfully complex rock systems 

 Burton wli- -I* 11 ? P 6 ^ 13 - Dr - Fermor - Mr Fox and the late Mr. 



Z ^nll? Hdy had n ° 6aSy ta8k ,n the Central Provinces 

 brieflv iw Tr . ♦ h 8 J ° ne aspect of th °se difficulties I mav perhaps 

 SL featl of ?K eStl °? °'/ he cal egneisses of those areas. It is a 

 those of cTZl£ v- F0Ck3 ° f thia class in India-whetber we consider 

 gneSse o ? X ^Jw' Y^S^tarn, Burma, or the recently explored calc- 

 fhev are met*™ I P J OV,nc ^ and Idar, that (on the supposition that 

 how anv Smnl. P T d t Calcareous «ediments of some sort) they never 

 .trate llieZlr d f S ^ aightf ° rward P*"*** *«*° unmetamorphosed 

 that ft harafv r«T ° f thw P ro Po^on is so generally recognised as true 

 great Vindh L ^7 ^T^ U ia notorious that all through the 

 great Vmdhyan and other old series such the Cuddapahs and Iv.rnul* 



