SAIGHAN. 



59 



of conglomerate underlain by a curious calcareous rock resembling 

 travertine, whicb latter is found on the southern side of the Kotal-i- 

 Kabuchi and for some miles up the valley of Sayad Baba. In the 

 latter locality it occurs in thick masses associated with con- 

 glomerates and pebble-beds. It appears to be a purely local develop- 

 ment of the Upper Tertiary sub-aerial facies. J ust below the junction 

 of the valleys of the Ao dara and Begal, these beds overlie bright 

 red conglomerate which is presumably the equivalent of the red Upper 

 Tertiary conglomerates of Banak and Madar in Kahmard {infra, p. 

 67). In Sayad Baba the junction between the Tertiary and older 

 rocks is a fault which runs from E. by N. to W. 

 Sayad Baba ^ <^ Beyond this fault, the hills on the left 



side of the valleys of Begal and Sayad Baba are composed of dark 

 slates with ash-beds and volcanic breccias capped by Cretaceous lime- 

 stone. The lower beds are evidently the Doab series ; they are very 

 variable in thickness, being as much as 1,000 feet thick in Begal 

 opposite the mouth of the Ao dara, but much thinner in the neighbour- 

 hood of Khargin dara. In the latter locality and on the hills between 

 Begal and Dara Hech, the Saighan series appears between the Doab 

 volcanics and the Cretaceous limestone ; it is thickest on the east, 



4, Cretaceous limestone. 2, Doab series. 



3, Saighan series. 1, (?) Fusulina limestone. 



a, white basal bed of Saighan series. 



Fig. 8. 



Sections on the left side of Khargin valley ; A, i mile above the mouth ; 

 B, l\ mile above the mouth ; C, 2 miles above the mouth. 



