386 On Metallic Minerals. 



stratified, but this feature was not very distinct, owing to 

 the rugged nature of the section in which it was examined. 

 The prevailing, though not the essential colour, Avas here 

 present in this rock, varying from brick red to yellowish 

 red passing into yellow. It is also characterized by those 

 red spots and protuberances, \vhich have been given, though 

 I believe, erroneously as a certain type of this rock. The 

 action of the atmosphere causes the exposed surface of the 

 rock to crumble away leaving in many places where these 

 spots occur mamillary protuberances : they are sometimes 

 hollow, and then have the appearance of miniature craters, 

 occasionally these spots yield to weathering more readily 

 than the other portions of the rock, in which case rounded 

 holes on the surface are seen an ajipearance very common 

 in the detached masses of this rock, which are found 

 distributed over the country. The structure of this sand- 

 stone is generally fine grained, but it is often that of a 

 coarse conglomerate. Sometimes coloured streaks or 

 bands parallel to each other and to the lines of stratification 

 are very distinct upon a cross fracture. This formation 

 appears to be contemporaneously the same as that with 

 which the iron ore is associated in the higher i)ortions of 

 the Gannanoqui. It also appears to have been formed from 

 the debris of a rock common in this part of the country, 

 the constituents of which are very red felspar ; light blue 

 opalescent quartz ; a small portion of green hornblende 

 with occasionally a little mica. This quartz which is easily 

 recognised, is frequently seen in the sandstone. The rock 

 alluded to may be seen near Kingston and at the^J^'urnace 

 Falls on the Gannanocpii. 



Beyond this sandstone, to the eastward, a point projects 

 out towards the St. Lawrence, (which bathes its foot) 



