34rt 



On the age of the Coal strata in Central India. [No. 4. 

 1|~ Mahddeva Hills. 



2. — Near Nagpore City, 



3.— At Kotd. 





Massive sandstone 

 with iron bands. 



Carbonaceous and 

 other shales with 

 ferns, vertebraria, 

 phyllotheca, &c. 



Sandstone. 



Green shale. 



0£ 



too 



Massive sandstone 

 with iron bands. 



o 



CO 



o 



V.CO 



Laminated argilla- 

 ceous sandstone 

 with ferns, verte- 

 braria, phyllothe- 

 ca, &c. 



Sandstone. 



Green shale. 



c 



Red shale. 





Crystalline lime- 

 stone. 



Massive sandstone 

 with iron bands. 



Argil lacious lime- 

 stone. 



Bituminous shales 

 with fishes. 



Sandstone. 



bituminous shales 

 with argillacious 

 limestone. 



Limestone. 



Clays with lime- 

 stone. 



Red shale. 



Limestone. 



In the preceding sections the dimensions depend partly on infer- 

 ence with the exception of those of No. 3, which were ascertained 

 exactly by the measurement of the late Dr. T. L. Bell. They are, 

 however, I believe, sufficiently accurate for the purpose for which 

 they are given. That purpose is to exhibit the similarity, which 

 exists among all these sections. Immediately under the upper sand- 

 stone, laminated rocks are seen in all. In section 1st, the shales 

 are bituminous and carbonaceous, while in section 2nd, they are of 

 argillaceous sand. But that they are of the same age, there can be 

 no doubt, as many species of fossils are common to both. In com* 

 paring sections 1st and 3rd, we find that the latter instead of hav- 

 ing the limestone all collected in the lower part of the section, as 

 is the case at Nagpur and in many parts of the Nizam's country, 

 has it interstratified with the shale ; but leaving this peculiarity 

 out of view, we perceive that in it the bituminous strata occupy 

 the same position as in section 1st. The difference in organic re- 

 mains between these two sections is more than counterbalanced by 

 their agreement in the sequence of the inferior rocks, which (still 

 omitting the interstratified argillaceous limestone from section 3rd, 

 and choosing section 2nd as being better known for comparison 

 with it, instead of section 1st) gives us in descending order sand- 

 stone and clay, red shale and limestone. 



