PREVIOUS WRITERS. 25 



first recognized the unequivocally sedimentary character of the rocks 

 composing it. 



In 1888 appeared the first part, and in 1889 the second part, of a 

 paper on the " Dharwar System, the chief auriferous rock series of 

 South India" (Records, Geological Survey of India, Vol. XXI, p. 2, 

 1888, and ibid, Vol. XXII, pt. 1, 1889), which embodied all the further 

 knowledge gained about the system in various parts of the penin- 

 sula, but specially in Mysore and the Raichur Doab (in both of which I 

 had made tours intermediately), and the adjoining parts of Bellary. 

 The fresh light thus thrown on Bellary district was the proving of the 

 existence of a narrowband of Dharwars branching up north-westward 

 into the Harapanahalli taluq from the great Dambal-Chiknayakan- 

 halli band, near Chitaldroog, and the working out the division of the 

 Penner-Haggari band northward of Bellary and up the valley of the 

 Tungabhadra to Kampli. In the way of negative information it was 

 shown that there was no extension southward of the Tungabhadra 

 of the great Maski Dharwar band in the Raichur Doab, and lastly, but 

 not leastly, the structure of the Sandur and Copper Mountain syn- 

 clinals, both of them tough geological problems and the most interesting 

 pieces of the Dharwar system in British territory, had been made 

 much more intelligible. 



No publication dealing with the Geology of Bellary district has 

 since appeared in India as far as I know, but in a paper in the 

 "Annuaire Ge*ologique Universel " (Jour. VI, p. 575) M. Emm. de 

 Margerie, in reviewing the work of the Geological Survey of India 

 in the Deccan, calls special attention to the strong lithological re- 

 semblances between the members of the Dharwar system and -those 

 of the typical Huronian group in the Lake Superior country, and 

 so the very remote antiquity of both systems. 



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