282 WYNNE : GEOLOGY OF THE SALT RANGE IN THE PUNJAB. 



Himalaya it appears that four carboniferous forms are common to the 

 formation as known there and in this Salt Range district.* When the 

 Survey collections made in this country have been examined, it is possible 

 that not only the carboniferous, but also the newer formations, may be 

 found to contain other Himalayan forms. 



The development of the whole Salt Range series is not at any place 

 complete, the groups changing along their outcrop, in thickness^ if not 

 also in character ; and the same series^ from the fourth to the seventh 

 group (in ascending order) ^ or omitting the eighth, from the fourth to 

 the ninth, extends westwards, Trans-Indus. The tenth group does not 

 extend recognisably to the west 5 the eleventh covers all below it, except 

 in the extreme east or west ; and the twelfth (or part of it) is super- 

 imposed throughout. The latter group includes some representatives of 

 the " Sub-Himalayan " divisions of Mr. Medlicott's Memoir "On the 

 country between the Ganges and the Ravi;" but it is doutbful 

 whether the Subathu rocks northward and eastward of the Potwar 

 plateau are represented to any extent along the range except by a few 

 thin layers in its eastern sections. Even though some similarity in the 

 Bakrala ridge has been pointed out, the close identity of the lower 

 tertiary Salt Range sandstones with the Nahan group is not at present 

 strongly insisted upon, while there is sufficient reason to suggest it. 

 The Siwalik beds above these have been lately shown to belong to the 

 same group both here and in the country extending hence to the Sub- 

 Himalayan area. 



* Captain Godwin-Austen's specimens, similar to those of tlie Salt Range, are Athyris 

 subtilita, Spirifera MoosakJiailensis, Rhynconella plewrodon, Streptorhynchus crenistria, 

 Productus semireticulatus, and P. Mumboldtii (See Mr. T. Davidson's list in Part I of this 

 Eeport ; and Note on the carboniferous Brachiopoda collected by Captain Godwin-Austen 

 in Kashmir, by Mr. Davidson, Quar. Jour. Geol. Soc. Lond., Vol. XXII, p. 29). 



Dr. Stoliczka's specimens, identical with Salt Range ones, are Spirifera MoosaJcJiailensis, 

 Productus longispinus, P, semireticulatus, P. Purdoni. — Memoirs, Geol. Survey of India, 

 Vol. V, Part 1, page 27. 

 ( 282 ) 



