CHAND1 HILLS AND COUNTRY WEST OF MITAWALA SOT. 93 



however, that Mr. R. D. Oldham considers that there is an uncon- 

 formability in some pebbly sandstones not far from the Diowcili en- 

 camping ground (55). 1 I was unable to find the precise position of 

 this unconformability, which may have become covered up since Mr. 

 Oldham visited the place. Mr. Oldham also states that he has found 

 similar unconformabilities in the Siwaliks south of the Dehra Dun. 

 From some correspondence which passed between us, my colleague 

 seems inclined to regard them as mere local unconformabilities. 

 From the numerous excellent sections which I have seen through the 

 whole of these series, I gladly acquiesce in this, inasmuch as any 

 thorough unconformability would surely have been manifest among 

 these naked well-exposed strata. 



This s6t is cut out entirely among the Siwalik conglomerate, 



which has a good many clay bands interbedded 

 Ghdzir4m.ka.s6t. (si) ... . * . J J .. . ., 



with it. 1 he sot runs generally along the axis 



of a synclinal fold, which is the complement of the normal anticlinal 

 at the south edge of the Chandi hills. The hill spurs of the con- 

 glomerates on the south side of this sot display the triangular wedge 

 structure noticed previously in many places, e.g., in the country south 

 of the Sona N. This, as before, is owing to the moderate dip of 

 between 20 and 30 down the hillside. 



In the stream next to the north, named the Mundhal on the four- 

 inch maps, but unnamed on the one-inch maps. 

 Mundhal N.(s6) . 



the dips are entirely S. W. or YV.S.W. at very 



low angles of 5 , until near Mundhal village where they are underlaid 

 by the nearly horizontal sand-rock, which appears as a shallow dome, 

 and occupies the low ground to the east of that village. The boun- 

 dary between the two rock-stages forms a semicircle, and the dip of 

 the upper beds is outwards from this line of junction. Northwards 

 from this dome a narrow outcrop of the sand-rock follows parallel 

 with the north and south fault, which can be traced the whole way 

 from the Mitaw£la sot to the Bheng R. (situated on the north edge of 

 sheet II of the one-inch maps.) The disturbance along this line of 

 1 Rec, G. S. I,, XVII, p. 164. 



( IS' ) 



