no 



GRIESBACH : GEOLOGY OF THE CENTRAL HIMALAYAS. 



limestone. This system of beds marked (6) throughout my sections 

 is in descending order as follows : — 



Thickness, 

 feet. 



Dark-blue hard limestone with Crinoids, Corals and Orthocerassp. 



Bluish-grey earthy shales (showing cleavage) with partings and 

 thin beds (2") of limestone at exact intervals of i'6", dip 33 N.E. 



Massive dark-grey limestone with Encrinite stems ; towards 

 the base the limestone becomes very concretionary in layers 

 of i' 3" thickness, alternating with flaggy beds, which are divided 

 by thin shaly layers ........ 



Thicker beds same as 4, with thin partings of shales . 



Massive dark-coloured splintery limestone, very hard and without 

 partings of shales ; traces of Corals and Encrinites . 



Hard dark-coloured limestone with some shaly partings ; towards 

 base some flaggy beds of flesh-coloured quartzite, and near the 

 boundary with the underlying upper Silurians, passing gra- 

 dually into the same . ... 



36 



60 



120 

 100 



220 



130 



Total 



. 666 



The system (6), the prevailing rock of which is a dark limestone, 



., rests on the flesh-coloured quartzites, &c, (5) of 

 Rests on upper silu- iV - ^ ' w/ 



rians(5). the upper silurians, and is overlaid by the red 



Crinoid limestone (7) in all my sections. As I have already explained in 

 the chapter on the carboniferous system, this complex of limestone may 

 possibly be looked upon as an equivalent of the devonians ; in support 

 of this I have nothing to offer, but the evidence of Coral remains, 

 which occur both in the devonian and carboniferous systems, and the 

 stratigraphical position immediately above and close lithological con- 

 nection with the silurians. 



In the Niti sections it may be seen invariably above the flesh- 

 TU . , „„ . „«^ eM coloured quartzites (5), and I believe that it 



Thickness increases t. \on 



further south-east. swells out to far greater thickness further to the 



south-east, towards the Milam area, although I have not been able to 

 obtain measurements there. From the high ground south-west and 

 south of the Niti pass, the dark, steep cliffs of this CVtf /-limestone (6) 

 can be traced along the left side of the Dhauli river, where it forms 

 the high projecting spur (15,900') south-west of the Silakank No. 2, 

 ( no ) 



