282 RECENT DEPOSITS OF NERBUDDA VALLEY. 



Fig. 1. Bank of stream near Devacachar, Nerbudda Valley* 



Section at Dongagaon. 



a. Keddish yellow clay; b. Sand and gravels; lower group: c. Fine alluvium ; 



upper group. 



In the above section the unconformity of the upper and lower group 

 is clearly seen, but such cases are of rare occurrence, though a close 

 examination will often reveal similar, though rarely such well marked 

 and striking, cases as the above. 



Along the course of the Omer and Sher rivers, this clay is often seen 

 20 feet thick and its greatest thickness is probably not under 30 feet ; 

 but in some places it does not attain more than 

 half the last mentioned amount, as in the follow- 

 ing section near Dongagaon, (17 miles above Sagwan Ghat), where both 

 the lower and upper group are fairly developed together, which is not 

 usually the case. 



Section near Dongagaon (ascending). 



Group a. 



1 Very coarse conglomerate with large boulders, and remains 



of Elephas, 8fc. } a few feet, s 



2 Reddish yellow clay with kunkur, ...... 15 



3 Loose sands and gravels very false bedded with courses of 



hard conglomerate and a few bones throughout, ... ... 35 



Group b. 



4 Pale brownish alluvium and regur, 



35 



85 



The red clay occurs along the entire course of the Nerbudda as far as 

 examined, and to judge from published accounts, in all probability ex- 

 tends to the sea, and though dipping and rising at intervals along the 



