156 BLANFORD : GEOLOGY OF WESTERN SIND. 



There is a very marked distinction between the physical features of 

 Physical features of the extern and western portions of the tract. 

 area - To the eastward the Khirthar beds are largely 



exposed at the surface, and the hills are chiefly composed of anticlinal 

 ridges of nummulitic limestone. To the west the newer tertiary beds 

 prevail, and the hills are chiefly formed of flat-topped masses of miocene 

 Gaj rocks. Such anticlinal axes as exist consist of soft Nari beds, and 

 do not rise into hills. As a general rule, there is certainly less disturb- 

 ance of the rocks in this area than farther north. 



The Baran valley near Kajur, the halting place south of Pokran, 

 Baran valley near situated at the spot where the road from Sehwan 

 Kajur and Bachani. crosses the Baran river, is thickly covered either 



with alluvial gravel, in places cemented into a conglomerate, or with a 

 sandy deposit. The valley beneath the alluvial accumulations is com- 

 posed of Manchhar beds, conglomerate or the typical grey sandstone being 

 the beds most frequently seen at the surface. A considerable quantity 

 of fossil wood is seen, derived from Manchhar beds. The Nari group 

 is wanting on both sides of the valley south of Kajur, although it is 

 well developed at the end of the Yeting spur just north of the camping 

 ground, and the Gaj group is only represented by a very few feet of beds 

 with marine fossils, at the base of the Manchhar group, the two passing 

 into each other as usual. The Gaj, however, as might be expected, is 

 quite unconformable to the underlying Khirthar beds, the surface of 

 which has been worn and denuded before the newer tertiaries were 

 deposited. Near Kajur and north-west of it, on the west side of the 

 Batri Karchat valley, the G6j beds are thicker than elsewhere in the 

 neighbourhood. 



At Bachani, the camping ground south of Kajur, the subrecent 

 Unconformable con- conglomerate is seen resting unconf ormably ' on 

 glomerates at Bachani. Manchhar conglomerate. The former is horizon- 

 tal, the latter dips at an angle of about 45° to the north-west, and is 

 associated with grey sandstone. The pebbles of which the two conglo- 

 merates consist are very different, the subrecent rock being mainly 

 ( 156 ) 



