9% 



MALLET^ VINDHYAN SERIES. 



section of the same limestone, but sueli does not seem probable. Althoiigli 



the section immediately above the Bundair limestone at Sewar agrees 



pretty well with that above the Jhilalgurh limestone at Jhilalgurh, this 



9,greement is not found in the more extensive (thicker) section west of 



Siprl. There, the strata above the two limestones are not the same ; the 



question requires further investigation, but judging from the knowledge 



at present possessed, the probability seems to be that the limestones are 



different. If this be the case, instead of the Gunoorgurh shales alone 



we have here beneath the Bundair limestone— 



1st. Shales. 



2nd. Limestone. 



3rd. Shales and sandstone. 



The Bundair limestone in this region is very peculiar. It is a dirty im- 

 pure looking rock; light-blue, brownish or yellow in color, in places 

 largely crystalline and often containing strings and veins of caleite ; the 

 lower beds sometimes include bands and nodules of chert. A peculiar 

 concretionary (?) structure is largely developed, which even gives the rock 

 the appearance of a limestone conglomerate. 



The remaining portion of the lower Bundau's, that is, from the 

 limestone to the base of the upper Bundairs, corresponding to the 

 Sirboo shales, consists of alternations of sandy shales and bands of 

 sandstone. A complete section may be traced from Sewar on the Chumbul 

 to Sonaka Gurja at the top of the escarpment. 



Upper Bundair sandstone— 



Sirboos ... Shales ... 



Sandstone ... ... 



Shales ... 



Sandstone and shales 



White sandstone with yellow spots 



Ft. 

 95 

 4 

 16 

 150 

 55 



320 



Bundair limestone« 

 ( 9^ ) 



