MALLET;, VINDHYAN SERIES. 85 



From Billieri to within some miles of Kuttungi^ they are, to all 



,, , , , appearance, completely cut out by the northern 



Nerbudda Valley, -> r j j 



fault, but re-appear in the Singrampur valley. 

 Here remarkably good sections present themselves, and the whole of 

 the upper Vindhyans existent here may be studied within a space of two 

 or three miles. 



In a little hill, one mile west of Sagoni, and resting directly on the 

 massive Rewah sandstone, with a perfectly sharp division, the Gunoor- 

 gurh shales are found. In color they are deep Indian-red, earthy, 

 micaceous, in beds mostly ^ to 2, often 4 or 5 inches thick, and include 

 a few thin somewhat arenaceous layers of a greenish-grey color. They 

 are generally brittle, so that it is not easy to obtain a good specimen of 

 them, and are not calcareous in this region, until at about 200 feet from 

 their base they gradually become mixed with thin bands of impure 

 limestone, and higher up with a few of red, earthy sandstone. The lime- 

 stone comes in above. Many parts of it are shaly, others thicker-bedded 

 and purer. Near Sagoni the strata in the middle portion average 

 about 18 inches, dark grey in color, weathering light or yellowish-grey. 

 The lower and upper portions are thinner-bedded and inclined to shali- 

 ness ; here and there arenaceous bands making their appearance. Between 

 the limestone and the sandstone above there is a very constant band, 

 about 20 feet thick, of greenish-grey shale containing layers of impure 

 limestone and sandstone, the former chiefly in the lower part and vice 

 versa. The lower Bundair sandstone is rather thin-bedded ; some parts 

 pitted with numerous red clay galls, others hard and fine-grained without 

 any such. Red and sometimes dirty-white are the prevailing colors, and 

 the rock is much rippled. Its somewhat coarse texture and the abund- 

 ance of clay galls, as well as difference in color, &c., distinguish it from 

 the upper Bundairs. 



In the vicinity of Singhorgurh a few feet of greenish-grey shale 

 rest immediately on the sandstone with a well-marked division, and then 



( 85 ) 



