DESCRIPTIVE GEOLOGY: SLATE ZONE. 113 



The above is practically the section figured in Dr. Verchere's 

 section (Journ. As. Soc, Bengal, Vol. XXXVI, p. 29, 1867) and 

 rather unfairly animadverted upon by Wynne and Waagen in their 

 memoir, p. 14 ; but he apparently did not detect the thin and some- 

 what obscured outcrop of the Spiti shales or Cretaceous. For some 

 little way beyond this along the direction of the outcrop the Jura- 

 Cretaceous can be followed by the depression at the surface alluded 

 to above, but about 1 mile on this side of Shakur Bandee the debris 

 from the Nummulitic cliffs have hidden the outcrop for the rest of the 

 way. Returning back along the outcrop we might follow it in a 

 S.S.W. direction across the hill spur going from Sirban to Bazdar, 

 when we should see that it and the overlying nummulitic formation 

 are not continued in this direction, and that the Jura-Cretaceous 

 outcrop returns upon itself, following a devious course towards 

 Dhumtour. The steep glen to the west of this spur is cut down 

 through the Trias into the Infra-Trias, and there remain on the hill 

 east of Tanakki only two small patches (scarcely representable on this 

 scale map) of the Jurassic, Cretaceous and Nummulitic formations. 



The steep crags of Nummulitic limestone with the strata vertical 

 or reversed which come next the Jura-Cretaceous band on the 

 pathway from Sirban to Nugukkee shew the usual characteristics 

 of that series. The pathway zigzags down among its cliffs, which 

 gradually lessen in steepness as the somewhat large village of 

 Nugukkee is approached. Although the strata are still dipping in 

 towards the hill-side, it is plain that we are ascending in the series, 

 for shaley bands interstratified with the nodular limestone become 

 more numerous. In one of the former quite close to Nugukkee and 

 a little north of it there is a rich band of corals of the genus Mont- 

 livaltia. Nugukkee is placed on the chief beds of shale which make 

 a somewhat flattened-out platform along the axis of the reversed 

 synclinal. The platform is bounded on the south by a descending 

 series of more of the harder Nummulitic limestone which there again 

 presents a steep scarp down towards the valley of the Dore (see view 

 of Sirban from the south). 



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