364 Report on the Geological Structure of the Salt Range. [No. 4- 



1844, 409 tolas* of gold were collected. 



1845, 272. ..Do Do Do. 



1846, 332. ..Do Do Do. 



It is of course the object of the gold- washers to conceal as much 

 as possible the amount of gold obtained, so as to keep the tax as low 

 as possible. 



The Upheaval of the Salt Bange, &c. 



Before closing our account of the Salt Eange, it remains for us to 

 notice certain particulars in the conditions under which its forma- 

 tions were deposited, and certain phenomena they in some places 

 present, resulting from the general upheaval of the range into its 

 present elevated position. 



We conceive that previous to the general elevation of the strata 

 and during the period of their deposition, they must have undergone 

 a succession of gradual risings and sinkings. 



The Salt marl and the Devonian strata which succeed have been 

 probably deposited in shallow water as indicated by the frequent 

 occurrence of ripple markings on the sandstones. 



The lower beds of the carboniferous limestone which follow, must 

 from the abundance of large Brachiopoda they contain, have been 

 deposited at a considerable depth, as such molluscse are known to 

 characterize a marine zone of upwards of eight hundred feet in depth. 

 At this depth the influence of tides could not produce the ripple 

 markings observed in the Devonian sandstones, and we must therefore 

 infer that previous to the deposition of the carboniferous strata, the 

 former must have undergone a gradual subsidence to an extent suffi- 

 cient to admit of the deposition of the latter, the strata of which 

 must have rapidly increased in thickness, so as to have had their 

 surface raised to a depth at which the Cephalopoda which abound 

 in the upper beds could exist. 



By the deposition of the sandstones and shales of the middle car- 

 boniferous series, the strata seem to have been elevated to the sur- 

 face of the sea and a beach at least must have existed, on which the 

 marks of falling rain or hail were impressed. After this period, a 



* This Tola weighs 165 grains. In 1844, there were therefore collected 140 

 Troy Oz. and 285 grains of gold. 



