406 Oti Metallic Minerals. 



About one mile and a half higher up the river, and about 

 one quarter of a mile above the falls, another section of 

 this sandstone is seen, — here the French formerly quarried. 

 From the circumstance of the strata of sandstone in the 

 first quarry dipping, as has been described, faster than the 

 river, I was induced to think that this section would be 

 deeper than the other, and xipon proceeding to the spot, 

 this was found to bo the case. The sandstone here forms a 

 bank about twenty feet high, and its summit is perhaps 

 fifty feet above the river ; immediately at its base, a coarse 

 conglomerate, composed of large rounded pebbles of 

 quartz in a paste, apparently of indurated clay, was 

 noticed. I was not able to ascertain what rock holds its 

 position between this conglomerate and the sienitic rock 

 below, which forms the falls of the greys, and much of the 

 shore at its foot ; but I think it is a recurrence of the same 

 sandstone. An interesting geological fact was noticed here, 

 similar to what has been observed in other places in Canada, 

 viz. that the primary rock beneath appears to have thrown 

 up the sandstone, and occasioned an opposite dip ; thus 

 the sandstone below the falls dips down the river, while 

 that above is inclined the other way. 



The profusion of magnetic sand on the shores of this 

 river in this place has been already mentioned, as well as 

 the cementing power it exerts. 



The sand, or rather loam, which is used in the *' moulding 

 room" for the finer impressions, is procured from England, 

 as it is said that an article proper for the purpose has not 

 been met with in the country ; they, however, both at 

 Marmora and Kingston use a sand for casting stove plates, 

 procured in the neighbourhood of those places. Sand of 

 the best description must be of rare occurrence, as we are 



