108 NERBUDDA DISTRICT. 



assemblage of rocks is marshalled, namely the Sagur Shell-limestone 

 noticed by Captain Nicholls ; the crystalline limestone of Bhera ghat ; 

 and the Lohargaon, and Rewah limestone. His reason why these should 

 have been grouped together it is very difficult to imagine : the rocks are 

 as unlike each other in lithological aspect as is well possible. The pre- 

 sumption would certainly be that the first is " intertrappean," the 

 second has been well described by Captain Franklin as " altogether 

 unconformable" to the sandstone of the Bundair Range, and whatever 

 may be the exact Geological age of the third mentioned rock, it is un- 

 questionably intermediate between that of the first and second. 



Mr. Hislop has mentioned in his memoir " on the age of the Coal 



strata in Western Bengal and Central India,"(«) 



1855. Hislop. i . , , i- ■ . . <i i • i 



some of the rocks included in the area which 

 forms the subject of the present report. He speaks of the carbonaceous 

 shales, &c. to the south of the Mahadeva hills, and identifying them 

 with similar beds found near Nagpur, and again near Kotah, he 

 points out their connection with those rocks known to contain coal 

 in the Damuda valley, and comes to the conclusion that all belong 

 to the same age. Subsequent examination of the localities mentioned 

 has tended to confirm his conclusions. It has also, however, introduced 

 a line of geparation between the lower and the upper rocks of the 

 Mahadeva section near the Mahadeva hills, considered by Mr. Hislop 

 as all belonging to the same group. 



Messrs. Robert and Adolphe Schlagintweit have both noticed the 



rocks of this district. Mr. Robert Schlagintweit 



1856. Schlagintweit. 



describes the bone deposits of the Nerbudda 



noticing the occurrence with the bones,(Z») in brown alluvial clay, 

 " of shells of Unio, Melania and the fresh water species." But he 



(a) Jour. As. Soc. Bengal, Vol. XXIV, p. 347. 

 (6) Report VI and VII of Magnetic Survey of India. 



