GEOLOGY OP SIND. 9 



It remains to indicate the representatives of these rocks elsewhere. 

 Though they appear to be unusually widely diffused, the information 

 afforded as to their age is not great. 



In Cutch, aluminiferous clays and " marls of every variety of colour" 

 are stated* by Captain Grant to occur near Mhurr. Although he 

 classed these beds with his coal-bearing series, which, in places at least, 

 is Jurassic, these alum-bearing beds, occurring close to the border of the 

 nummulitic limestone, may not improbably represent the variegated 

 clays and sandstones of Sind. The mass of the coal-bearing Cutch beds 

 are probably older, f 



Similar beds of clay and sand containing gypsum and lignite 

 underlie the nummulitic limestone of the Punjab salt range. J They 

 vary in thickness from about 3 feet in the east to 300 feet and more in 

 the west. (Dr. Oldham). Dr. Fleming states, loc. cit., p. 333, that near 

 Kuttha and Moosakhail arenaceous limestone containing nummulites and 

 other fossils common to the limestone above is interstratified with them. 

 If this be the case of course they form an integral portion of the nummu- 

 litic series. Mr. Theobald gives a section at Kolki, (1. c, p. 668,) showing 

 that some carbonaceous alum-shales are interstratified with the lowest 

 beds of the nummulitic limestone. All observers agree that the shales 

 and sands vnih. lignite rest upon Jurassic beds. In their mineral character, 

 as described by all observers, and their position beneath the nummulitic 

 limestone, they correspond so exactly with the Sind beds, that but little 

 doubt can exist of their representing the latter. 



It appears probable, therefore, that this series of variegated clays and 

 sands has a considerable extension to the north and north-east. It is 

 unnecessary to enter into the question of their further extent at present 



* Geol. Trans., London, 2nd Ser., Vol. V, page 295. t See Notes on Cutch. 



t See Dr. Fleming, Jour. Asiatic Soc, Bang., XXII, pp. 333, 4564, &c., W. Theobald, 

 Jr., Jour. Asiatic. Soc, Beng., XXIII, 658, 666. Dr. Oldham. — ^Memo. on the results of 

 cursory examination of the salt range, &c., 1864. 



B 



