1853.] FRERE — GEOLOGY OF A PART OF SIND. 349 



[On January 18, 1853, Dr. A. Fleming had the opportunity of 

 riding up with an escort to the mouth of the Vidone Pass, opposite 

 Dera Ghazee Khan. Here also he observed the deposits above 

 noticed, and found boulders of white quartzite and of Productus-lime- 

 stone.] 



6. On the Geology of a part of Sind*. By H. B. E. Frere, 

 Esq., Commissioner in Sind. 



[In a letter to Col. Sykes, F.R.S., F.G.S.] 



I HAVE taken the opportunity of the "Duke of Argyll" going 

 direct from Kurachee to London, to send a couple of cases to your 

 address. They contain a number of tertiary fossils, chiefly bones 

 of Mammalia, very much resembling the Perim fossils ; these were 

 collected by Mr. Arthur Young, the Deputy Collector of Sehwan, 

 who, if they are of any interest, would wish you to keep for your own 

 collection any you like, and to present the rest, if you consider them 

 worthy of presentation, to the India House, or any other public 

 museum. Any account of what they are would be most acceptable, " 

 and any call for further information or more specimens would be 

 carefully attended to. Neither he nor I have been able to reach the 

 exact locality where they are found. 



It is in the hills S.W. of the Munch ur Lake and Sehwan, and 

 about half-way to Shah-billawull, but on the E. side of the Hubb 

 River. I must have been very near it in traversing the hill-route 

 from Kurachee to Sehwan in November 1851, but all the rocks I saw 

 Avere nummulitic limestone greatly contorted, the ranges of hills being 

 generally "wrinkles," as it were, of nummulitic strata; which could 

 be for the most part traced with great clearness from the valley on one 

 side over the hill and down into the valley on the other (see diagram) . 



Diagram showing the Section of Nummulitic Range between Kura- 

 chee and Sehwan, i7i Sind, with the accompanying shale and gravel 

 beds ; as seen in the cross-valleys. 

 \v. e. 



1. Beds of gravel and sandy conglomerate. \ ^ •.. i,,,^.- 



2. Variegated marls and shales, or indurated mudrbeds. J ' ' 



3. Nummulitic limestone, forming the Range. 



The western slopes of the ranges (the general direction of which is 



* For Observations on the Geology of Sind, see Papers by Col. Sykes and 

 Capt. Smee, Proc. and Trans. Geol. Soc. 18.34 ; by Capt. Grant on Ciitch, Proc. 

 and Trans. Geol. Soc. 1S47 ; by Capt. Vjcary on the Beloochistan Hills, Quart. 

 Journ. Geol. Soc. vol. ii. p. 260 ; and on other parts of Sind, ibid. vol. iii. p. 331. 



