SOUTH-WESTERN PORTION OF KARACHI COLLECTORATE. 179 



Near the Habb the rocks seen in the range just mentioned are 

 chiefly fine sandstones, resting- upon pale olive shales, very sandy, and 

 interstratified with thin bands of hard shale and sandstone, only differ- 

 ing from the Khirthar beds of Hamlig by being more sandy. Similar 

 beds are seen in the banks of the Habb in places, but in general very 

 few rocks are exposed in the river channel. 



The range of hills, about 2 miles west of the Habb, and north of 



Moidan (? Maidan) Thana, a police station about 

 Near Moidan. 



1 miles south of the Kand stream, is composed 



of limestone and calcareous sandstone dipping south-east at a low angle. 

 The uppermost layers abound in Orbitoides papyracea, but no nummulites 

 were observed here, nor elsewhere in the Nari beds of the Habb valley. 

 A peculiar Cidaris spine, long and nearly cylindrical, with projecting 

 points, is common. As a rule, the beds are not fossiliferous. These 

 Orbitoides sandstones and limestones, however, are far above the base of 

 the Nari beds. 



The Nari group presents similar characters for many miles down 

 Nari beds of Habb * ne Habb, and requires no detailed notice. It con- 

 valle y- sists of massive sandstones, usually fine-grained, 



and shales, usually sandy, but sometimes, as near the mouth of the Khar 

 Nai, bluish-grey and hard. Occasional bands of limestone occur, contain- 

 ing Orbitoides and a few other fossils ; in some hills, south of the Khar 

 Nai, Ostrea multicostata occurs with Orbitoides in limestone precisely 

 like that of Moidan. The presence of these bands of marine fossils 

 at various horizons in the Nari group shows that the beds must in all 

 probability have been deposited under different conditions from those 

 prevailing during the formation of the unfossiliferous sandstones belong- 

 ing to the same group in Upper Sind. 



The Khar Nai is a considerable water-course cutting its way out of 



the Gaj plateau a few miles south of the Ghati 



Trigonometrical station. The valley of the Khar, 



to the north-west, unites with the depression in which the Kand Nai 



runs northward. The Nari beds, however, only extend a very short 



( 179 ) 



