110 BLANFORD : GEOLOGY OF WESTERN SIND. 



breadth of the outcrop is only a little more than half a mile, the dip 

 being 60° to 80°. Most of the section is concealed, but the thickness 

 of the Manchhars cannot exceed 3,000 feet altogether. 



A glance at the map will show the steady strike of the Manchhar 

 and G&j outcrop across the valley of the Angyi 



Apparent unconformity _ 



between Nari and Gaj Nai. The beds dip east by north at angles vary- 

 ing from 35° to 80°. The valley itself, however, 

 is entirely composed of Nari beds dipping in a synclinal, pretty regular 

 to the east of the stream, but much broken to the westward. At first it 

 appears as if there must here be complete unconformity between the 

 Nari and Gaj beds, and as if the great anticlinal fold of the Bhit range 

 were of prior age to the deposition of the Gaj rocks. A careful search 

 along the Nari and Gaj boundary, which is, however, by no means 

 clearly exposed, has failed to show any distinct evidence of want of 

 parallelism, but it is difficult to believe, if the anticlinal and synclinal folds, 

 to which the lofty Bhit range and the Angyi valley are due, are of later 

 date than the deposition of the Gaj beds, that the outcrop of the latter 

 could remain so straight as it is, and so little in conformity with the 

 undulations of the underlying rocks. 



Up the Angyi valley 1 the beds are best exposed near the base of the 

 range on each side, the Khirthar, culminating 

 in the Guru ridge (Ghooroo on the |-inch map) 

 to the west, and the Bhit to the right. The level ground of the 

 valley is chiefly composed of the soft sandstones of the Upper Nari 

 beds, but these are frequently concealed by broad expanses of recent 

 gravel. Near the'border of the valley there is some very salt ground with 

 an efflorescence of chloride and sulphate of sodium, apparently pro- 

 duced by a zone of sandstone a little above the fossiliferous lower Nari 

 beds. The chief rocks seen in the middle of the valley are outcrops 

 of ferruginous sandstone bands. 



In the upper part of the valley some faulting occurs, and the Nari 



1 All the notes on the Angyi valley are from Mr. Fedden's reports, as are those on 

 the Naegh valley, and a large proportion of those on the country, between J hangar and 

 Pokran. 



( no ) 



