20 BLAXFOUD : GEOLOGY OF WESTERN SIND. 



rocks near the town are of Gaj (miocene) age. Indeed, fossil corals are 

 extremely abundant in the Gaj beds near Mugger Peer. 1 



" A report on Dhur Yaroo, in the Shikarpur Collectorate," by Assist- 

 ant Surgeon J. Lalor, published in the Transactions 

 Lalor, 1865. & . 



of the Bombay Geographical Society, Vol. xvii, 



page 302, mentions briefly some of the rocks of the Khirthar range near 



the locality described. 



In the Geological Magazine for 1866, Vol. iii, page 433, Mr. John 



Evans described some flint cores, from which flakes 

 Evans, 1866. 



had been chipped, obtained by Lieutenant Twemlow, 



R.E., in the bed of the Indus. The cores were remarkable for their regu- 

 larity. In a note to Mr. Evans, accompanying the specimens, General 

 Twemlow stated that the cores in question were obtained " three feet 

 below the rock in the bed of the river (Indus) ." In a subsequent 



letter (Geol. Mag., 1867, iv, page 43,) General 

 Twemlow, 1867. 



Twemlow gave a section on the river Indus near 



Sukkur, showing that above nummulitic limestone came a mass of flints 



covered by a recent silt deposit. The cores were found in the flint beds. 



The subject will be found more fully discussed in a note by the present 



writer, published in the Proceedings of the Asiatic Society of Bengal 



for 1875, page 134. Large quantities of flint cores have been found near 



Sukkur and Rohri, and there is a good collection in the Geological 



Museum, Calcutta. 



A very good Gazetteer of Sind was published in 1874, compiled by 



Mr. A. W. Hughes. The geology, however, was 

 Gazetteer, 1874. 



scarcely referred to, and the few notes upon it are 



by no means always correct. 



Lastly, the Survey contributions to the geology of Sind commenced 



with a paper, by the author of the present report, 

 Survey, 1867. t 



' On the geology of the neighbourhood of Lynyan 



and Runneekote," published in the Memoirs of the Geological Survey of 



1 It is needless to give lists of the corals described by Professor Martin Duncan, as it 

 may be hoped tbat full descriptions of the much larger collections made by the survey 

 •will shortly be published by the same naturalist who has undertaken their description. 



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