36 WYNNE : TRANS-INDUS SALT REGION, KOHAT DISTRICT. 



This line of enquiry suggests one improbability after another, and 

 when these are contrasted with the appearance of parallel sequence 

 previously described, weight may be given to the consideration that one 

 of the minerals forming a rocky band in the salt series, namely, gypsum, 

 is of common occurrence in varying amounts among the early tertiary 

 rocks of Northern and Western India; for instance, in Kutch/* at Lynyanf 

 in Sind, in the Subathu ferruginous clays of the Simla country, J and 

 along the northern side of the neighbouring Potwar plateau, extending 

 up into the Murree hills, § associated with red or variegated or greenish 

 gray clays, as here. The inference from this is that some at least of 

 the conditions by which certain of the results were produced here existed 

 widely at the commencement of the tertiary epoch. 



Besides this there are salt and petroleum springs in Burmah,|| which 

 rise from presumably lower nummulitic rocks, and in the Nun or Lun 

 river below Masuri a salt-spring also occurs in the tertiary series.^" 



There is a strong brine spring issuing close to nummulitic limestone 

 south of the Bakrala ridge at Kalra north-west of Jhflam, and some 

 weaker brine springs are reported in the Subathu rocks of the Potwar 

 plateau westward by north from Fatehjung, a considerable town near 

 the petroleum wells of Ganda, some thirty miles west of Rawal Pindf. 

 An analogy between the sources of the salt of these tertiary and lower 

 tertiary brine springs, and the salt of the Kohat Frontier region, may 

 not appear far fetched when it is remembered how great is the extension 

 of the nummulitic formation stretching on both sides of the Himalaya 

 from Burmah, through the Punjab, Afghanistan, Persia, Arabia, Egypt 



* Memoirs, 



Geolog 



ical Survey. 



, Vol. IX, pt. 1, pp. 76, 90, &c. 



f Ditto 





ditto, 





Vol. VI, p. 4. 



X Ditto 





ditto, 





Vol. Ill, pt. 2, p. 177. 



§ Records 





ditto, 





Vol. VI, 1873, p, 61. 



|| Ditto 





ditto, 





Vol. VI, 1873, p. 67. 



% Memoirs 





ditto, 



• 



Vol. Ill, pt. 2, p. 177. 



( 1*0 ) 











