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TRANSACTIONS OF THE 



that the micaceous grits and conglomerates of the Rich- 

 mond coal measures have no analogy with any of the 

 former class that have come under my inspection. Nei- 

 ther do they resemble any one of the innumerable mem- 

 bers of the grauwacke and transition series. 



From the remark of Mr M'Clure, in associating these 

 grits with the old red sandstone, however I may dilFep 

 on the latter point, it is evident that his impression was, 

 the coal of this basin was older than that forraatiottj and 

 so far his views coincide with the writer's. 



For the present, therefore, reasoning from the pheno- 

 mena, scanty as they are, observable in the bituminous 

 coal deposit of Richmond, I am inclined to refer its 

 origin to an earlier epoch than coincides with that of the 

 most ancient portions of the secondary carboniferous 

 groupe of this country. 



