102 BLA.NFORD : GEOLOGY OF WESTERN SIND. 



from about 6 miles south of Eohri to the neighbourhood of Kot Deji, 

 green clays, with gypsum, dark -brown limestone, and very soft rubbly 

 white limestone, without nummulites, crop out from beneath the num- 

 mulitic limestone. These beds were at first thought to be possibly 

 representative of the Ranikot group, but no fossil evidence has been 

 found in favour of this view ; and strata, precisely similar in mineral 

 character to the most conspicuous bed of the formation, the pale green 

 clay, occur occasionally, interstratified with the Khirthar group, in the 

 Laki Range and near Hyderabad. The green clays and associated beds of 

 the Rokri Hills are consequently represented as Khirthars in the accom- 

 panying map. 



To the north of the Indus, near Sukkur, only a few isolated hills are 

 met with, the most northern being barely 3 miles from the river, but 



Physical characters of tne ran g e extends SOuth of Roliri for nearl y 50 

 ran S e - miles. It is throughout of small elevation, no por- 



tion of it probably rising more than about 200 feet above the alluvial plain. 

 Throughout the range, as far south as Kot Deji, there is an escarpment 

 along the western side of the hills, and the beds dip thence with a steady 

 gentle slope, rarely exceeding 2°, and in many places less than 1°, to the 

 eastward. Towards the southern termination of the range the dips are 

 e ven lower, and appear to form a low anticlinal, dipping to east-by-south 

 on the eastern margin of the hills, and west-by-south on the western 

 edge. Altogether, although the rock area towards the south is 15 or 

 16 miles broad, it is doubtful if more than 400 to 500 feet of nummulitie 

 limestone is exposed throughout. Perhaps 100 feet of the beds below 

 the limestone may be badly exposed east of the villages of Trimmo and 

 Hisbhani. 



The highest beds seen are those occurring on the eastern side of the 



Highest beds seen. nills ; near the village of Janoji. They consist of 

 Nummulitie limestone. white limestone, containing numerous nummulites, 

 especially N. spira, N. granulosa, and a rather thick lenticular form with 

 radiating striae, which may perhaps be N. vicaryi. These nummulites 

 weather out in large quantities and cover the surface. The rock contain- 

 ( 102 ) 



