166 BLANFORD : GEOLOGY OF WESTERN SIND. 



Gaj age. They may be of later date. It must be borne in mind that 

 all the later tertiary beds are very different near the coast from what 

 they are inland, and the opportunities of examining them were com- 

 paratively few and inferior in the former direction. 



Thus far, in the present chapter, the country described has lain to the 

 eastward of the great Gaj area, and in the northern portion of the tract 

 has been confined to the neighbourhood of the Karachi and Sehwan Hill 

 road, between Trak and Kajur. Before returning to the northern end 

 of the area to take up the description of the lower tertiary beds in the 

 Upper Baran valley and in the Habb drainage area, a few notes on the 

 eastern portion of the Gaj area may be given. 1 



The character of the Gaj beds is well seen on the Karachi and 



Sehwan road, near the camping ground of Khadeji, 

 Gaj beds near Khadeji. , 



about 31 miles from Karachi and 16 miles from 



Trak. The road from Trak passes across a plain composed of Nari beds, 



of which, however, but little is seen for 4 or 5 miles, and then enters 



the Gaj area. The rocks are nearly horizontal in general, one of the 



most conspicuous being a white rubbly limestone, closely resembling 



some of the Khirthar nummulitie limestones in character, but easily 



distinguished by its fossils and by the absence of nummulites. Other 



limestones of a yellow colour weather with a scoriaceous appearance and 



somewhat resemble laterite. 



On the left bank of the Khadeji stream, near the camping ground 



at Khadeji, there is a fine cliff of Gaj beds, and the hills in the country 



to the northward are flat-topped, and surrounded by steep scarps chiefly 



composed of limestone. The following is the section seen on the cliff :•— 



Ft. 



1. Gritty calcareous sandstones and calcareous grits, obliquely laminated, 



with fragments of organic remains ... ... ... 30 



2. Similar beds to the last, more or less compact and calcareous, some- 



times coarse grained. In some of the beds Operculina abounds 



30 



1 Almost all of these and of those on the country near Tong are froin Mr. Fedden's 

 reports. 



( 166 ) 



