MALLET^ VINDHYAN SERIES. 81 



they are again met with at Hoshungabad and are very probably repre- 

 sented in the Dhar forest, besides in the extreme north spreading over a 

 large extent of country to the south-west of Agra. It seems also that 

 they cover a large portion of that little known region extending from 

 Sipri westwards to Neemuch, as in a traverse made across it they were 

 passed over almost continuously from Boondee by Kotah to Chuppra 

 where the trap makes its appearance. It is further shown by inliers 

 far away from the main area that a considerable portion of the trappean 

 area, north of the Nerbudda and east of Neemuch, is underlaid by strata 

 of the Bundair group. 



Commencing the description of the lower Bundairs at their eastern 



development we may trace their lowest beds at 

 To the east. 



the fall of the Tonse. Resting on the thick and 



massive beds of the Rewahs are about three feet of a thin-bedded kind 

 of sandstone, which passes above into a greenish-grey sandy shale, the 

 two being mixed vdth each other in the transition. This shale quickly 

 loses the arenaceous element and passes into " thin shales. The perfect 

 horizontality of the bedding is remarkable, and the thinnest layers are 

 continuous all through for 300 yards; the lower eight feet are alternating 

 gray, greenish, and yellow sandy shales, wrinkled and minutely lami- 

 nated, all slightly micaceous ; some show ripple-marks, and in some 

 the irregular cross markings of clay might be taken for vegetable 

 impressions and casts ; in the upper seven feet there are partings of 

 flagstones.'^'^ The beds above these become gradually calcareous, and 

 higher up the Gimoorgurhs are a mixture of red earthy shale and thin 

 impure beds of limestone. In the Beehur, east of Kudda, the beds, 

 which are probably not much above those at the Tonse falls, consist 

 almost wholly of red shale with a few calcareous bands. Higher up 

 in the section the latter are frequent, varying from tolerably pure lime- 

 stone to marl and calcareous sandstone ; thus one mile south-east of Dokeri 



* Mem. Geol. Surv., India, Vol. II. p. 54. 



( 81 ) 



