INTRODUCTORY. S 



amongst the Sind collections. The examination of the country has 



proved that these sub-divisions are even more numerous, and extend 



throughout a greater duration of geological time, than was suspected. 



Unfortunately the detailed examination and de- 

 Examination of fossils. ... 



scnption of the large collections made by the 



survey from the Sind rocks have only been commenced, and only the 

 more common and conspicuous species have hitherto been clearly identi- 

 fied, and their position in the series determined. Still the knowledge 

 of the position occupied by characteristic species of foraminifers, corals, 

 echinoderms, and mollusks in the sequence must aid in the correlation of 

 fossiliferous beds in other parts of India. 



Another advantage of Sind is that it is nearer to Europe than most 

 Neighbourhood of Sind parts of India, and that the rocks form the eastern 



rocks to European form- 

 ations, prolongation of a tract of tertiary beds believed 



to be continuous with the well-known formations on the shores of the 



Mediterranean. 



For these reasons it has for many years past been desirable that the 



Previous arrangements geology of Western Sind should be examined in 



for geological survey of 



Sind. detail. The maps of the province were completed 



by the Revenue Survey in 1870, but before they were quite complete, 

 all the most important areas had been mapped, and it was proposed to 

 commence the geological examination of the province in 1869. Owing,, 

 however, to still more urgent demands upon the survey party at first 

 selected for the work, the seasons 1869-70 and 1870-71 were devoted to 

 some of the coal-fields in the Central Provinces. In 1871, I was again 

 directed to commence the survey of Sind, but the work had once more 

 to be postponed, in consequence of my being appointed to accompany 

 the Perso-Baluch boundary commission. 



Finally, at the close of 1874, Mr. Fedden was despatched to the 



Geologists engaged in province, and I joined him early in 1875. The 



survey. whole of the three working seasons, 1874-75, 



1875-76, and 1876-77, were devoted by Mr. Fedden to the examination 



of Central and Western Sind, and I was engaged in the area during the 



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