76 WYNNE : TRANS-INDUS EXTENSION OF THE PUNJAB SALT RANGE. 



Succeeding- the trias with parallel conformity comes at first a group 



of blackish-purple, thin-bedded sandy rocks and 

 Variegated group. - . ' , ' „ .... ,, 



clays, then a set or variegated, beds, tollowed by 



200 to 300 feet of dolomite, 1 of the same character as that above the 



trias at the top and on the north side of the Khasor range at Saiduwali, 



and like it overlaid by a white thin-bedded marly and dolomitic band. 



These magnesian rocks form a conspicuous zone ranging along the 

 cliffs with increasing- thickness to the west, generally rising" above a 

 bench occupied by the trias clays, &c, these resting upon the stronger 

 carboniferous group. 



The dolomitic band is succeeded by a great mass of the variegated 

 Jurassic rocks scarcely less than 1,500 feet in thickness. They include 

 white, pink, ferruginous, and purple, soft and sometimes coarse, gravelly or 

 even pebbly sandstones, alternating repeatedly with pale -gray, or greenish- 

 gray, carbonaceous, coaly and alum shales and clays, bole-like red bands 

 occurring near the top. Many bands of magnesian and dull gray com- 

 pact and splintery or marly limestone are interstratified, becoming more 

 numerous upwards, and there often filled with marine fossils, while the 

 more flaggy and sandy bands among the clays in the lower portion con- 

 tain numerous imperfect fragments of plants, a few of which resembled 

 leaflets of ferns. 



To the variegated series succeeds a thick mass of clays, drab or crim- 

 son, or in part jet black, with alum shales and 

 Jurassic limestones. . . . . . , 



coaly layers, and containing, as indeed do many 



of the earthy bands, plates of selenite. They have in places much the 

 appearance of the shales in the Jurassic beds of Kach, show the same 

 kind of yellow powdery partings, are covered here and there with white 

 saline efflorescences, and when broken into, are sometimes crowded in 

 the same way with small broken fragments of plants. At one place in 



i If this band of dolomites be identified with that at the extreme northern end of the 

 Khasor range, — and it seems very similar, — the Jurassic formation may probably be repre- 

 sented there to some extent ; but the identification is not certain, and no Jurassic fossils 

 have been found in the lower part of the dolomite or immediately beneath it in either place. 



( 286 ) 



