STKATIGRAPHIC GEOLOGY. 67 



with yellowish and gray limestones, and yellow marls. 

 Its fossils are numerous and of Jurassic ag-e. 



No. ] 0,— Newer than the last, but never in contact with it, is a 

 zone of soft, greenish brown, and olive sandstones, 

 conglomerates, and dark shales. It commences in the 

 eastern part of the range, extending further west than 

 No. 8 or any of the underlying groups to the east; 

 fossils are most rare and ill -preserved, but such as were 

 found were considered by Dr. Waagen probably creta- 

 ceous. 



No. 11 group is the massive white or light-coloured nummulitic 

 limestone forming so marked a series of cliffs and 

 escarpments, and of which the summit of the range 

 consists. It disappears in the dislocations at the Indus 

 and also thins out to the east. 



Nos. 12, 13, and 14 include the portions of the tertiary sandstone 

 and clay series overlying the nummulitic limestone. 

 Three sub-divisions of it, including Nahan and Siwalik 

 beds, have been recognised, chiefly in the east part of 

 the district, by Mr. Medlicott. 



No, 15. — In this may be included the alluvial and other super- 

 ficial deposits, together with an older diluvial or post- 

 tertiary conglomeratic group. 



The presence of a few small exposures of a peculiar trappean rock 

 will be noticed in another place. 



From this and Plate IX, it will appear that the rock groups 

 are irregularly distributed laterally. Of the whole (excluding the more 

 recent) , seven are found to the east and seven or eight to the west, two 

 only, or at most three, being continuous throughout the range. Four 

 of the western groups are absent in eastern sections, and four belonging 

 to the latter are unrepresented in the west, while of these eight only two 

 may belong to the same period. 



{ 67 ) 



