GEOLOGICAL FORMATIONS. 



41 



hula harjaa is the only form hitherto recognised that is also found in the 

 upper cretaceous olive shales ; tout a variety of the same shell is also found 

 in the Nari beds. 



Cretaceous and lower tertiary rocks of Baluchistan. — All the rocks 

 described in the last few pages as occurring below the nummulitic 



Infra nummulitic rocks limestone or Khirthar group are found in Lower 

 of Baluchistan. Sind, and, so far as is known, are confined to a 



tract near the right bank of the river Indus. Farther to the westward 

 the series of older tertiary and upper cretaceous rocks has not been 

 thoroughly examined, but the information hitherto obtained appears to 

 show that the strata below the nummulitic limestone are very different 

 in character from those found in Lower Sind. In Baluchistan, west of 

 the frontier of Upper Sind, lower beds crop out from beneath the massive 



Section of Upper Gaj nummulitic (Khirthar) limestone, forming the 

 river - crest of the intervening range of hills, and on the 



banks of the Gaj river, which traverses the range south-west of Mehar 

 (see Plate IV, Chap. IV), a series of more than 10,000 feet of strata is 

 exposed below the Khirthar group. The following is a rough section 

 of the rocks thus exposed, the thickness being merely an approxi- 

 mation : — 



p.. Massive nummulitic limestone, forming the crest 



| of the Khirthar range 



J 2. Shales, marls, and clays, mostly dark-olive in 

 colour, abounding in Nummulites 



3. Hard grey limestone, with Nummulites 



4. Argillaceous limestone, shales and clays, olive and 

 bluish-grey in colour, abounding in Nummulites 



f 5. Unfossiliferous olive and bluish-grey clays and 

 nodular shales, no limestone bands . 



6. Pale-brown sandstones in thick beds with vege- 

 table markings 



7. Fine greenish-white sandstone and shale, some 

 I of which is carbonaceous ..... 

 I 8. Dark-brown limestone and dark-green argillaceous 

 I beds, with Nummulites 



Khibthab 



Lowee Khiethab 



Feet. 

 1,200 



500 

 60 



400 



1,500 



1,000 



500 



100 



( 41 



5,260 

 ) 



