8 BOKAEO COAL-FTELD. 



Geology in even a very slight degree are well acquainted. The 

 relations of the Talchirs, however, is a subject not yet worn out. 

 With regard to the conditions under which the series was deposited, I 

 wish to say a few words, as it has some bearing upon the view which we 

 shall take of the overlapping of the Talchirs by the Damudas. If both 

 series were deposited under similar conditions, it would scarcely be fair 

 to argue that overlap indicated unconformity ; whereas if the conditions 

 under which they were formed were distinct, we should have some 

 reason for assuming this, even though we had not the direct evidence 

 in a vertical section of denudation of the one series having occurred 

 previously to the deposition of the other ; which would, of course, imme- 

 diately settle the question. 



The Damudas are assumed to have been accumulated under similar 

 conditions to those of the coal measures of England. Possibly such may 

 be the case. The Talchirs, however, are probably marine. Every cir- 

 cumstance is against their being fresh water deposits; the immense 

 area which they occupy and the continuity and constancy of character of 

 their beds being circumstances which tell immensely against the admis- 

 sion of fluviatile conditions. Differing then, as these two series did, in 

 their methods of formation, the overlap which we are so constantly 

 meeting with may be assumed as unconformable overlap ; or if we refuse 

 to grant as much, we may receive it as a basis for separating the 

 two series. 



Search for fossils was not rewarded, even by such unsatisfactory 



indications of a fauna as the so called Annelida 

 Fauna and Flora. 



tracks : and of plants there was not the faintest 



resemblance to a leaf or stem on any of the shales or sandstones. 



„^ A few intrusions of trap occur ; two near 



Chepree, and one east of Indi-a. i 



(46) 



