103 WYNNE : GEOLOGY OF THE SALT RANGE IN THE PUNJAB, 



The sandstones are sometimes conglomeratic^ and limestones are more 



largely developed in the western extension of the 

 Composition. „ .,.„ 



group. Frequently the rocks are lossiliierous, 



numerous indefinite plant fragments^ occurring in the sandstones in 

 the golden oolite and more calcareous beds — OstreayBxogyra, Terehratulm, 

 many Gastropods, unsymmetrieal Echinoid frag- 

 ments, and generally in the upper region Belem," 

 nites, and possibly Ammonites (these last being locally numerous Trans- 

 Indus) . 



There are associated with this group at Chiderii beneath Siran-ki- 

 dok and near Kyrabad, a very considerable thick- 

 ness of light grey incoherent sandstone or slightly 

 compacted sand with many alternations of orange-coloured or drab clays. 

 This soft group in some places appears to belong to, and in others to 

 be discordant to, the rest of the series, so that I have been unable posi- 

 tively to include it with them, more particularly because its whole 

 aspect is almost exactly that of one of the upper members of the great 

 tertiary sandstone-and-clay series, parts of which might have been 

 introduced by fracture or even unconformable deposition among the 

 older rocks.f 



The upper limits of this Jurassic group are rather indefinite, a 



gradual transition appearing to take place upwards 

 Upper limits. . t . i . • ■ ■, ■, 



mto the newer beds, and the junction with these 



being, as a rule, concealed by a talus of debris from the clifis above. 



In the western parts of the district along the southern side of the 

 Tredian hills, these upper beds partake of the 

 general contortion and disturbance to a degree 



* At page 269 of his larger Report, Dr. Fleming notes the occurrence of very perfect 

 fronds of ferns in the lower argillaceous beds of this group. The general accuracy of his 

 observations led me to frequent but unavailing search for these, and only a few imperfect 

 fragmentary fern impressions have been found. 



t These possible unconformities have never been established, and the localities are 

 among too many faults and disturbances to encourage belief in them. 



( 102 ) 



