148 Transactions of the Canadian Institute. [Vol. VII. 



about twelve feet of strata, dipping lightly to the west. The contact 

 plane between these strata and the granite has, for the upper two-thirds 

 of its length, a dip of about thirty-five degrees to the west. Towards 

 the base this dip flattens out, and just where the line of contact passes 

 beneath the material of the railway bed, the bedding of the sediments 

 and the surface of the granite seem to be parallel (figure 2). 



In this calcareous conglomerate are found fragments of crinoid 

 stems and the casts of a Cameroceras. Several specimens of the latter, 

 composed of white crystalline calcite, were taken from one of the lower 

 beds at a point six inches from the granite. Other specimens more 

 than five feet distant from the granite are identical in appearance with 



Figure 2. — Diag:ram to show the relative positions of the calcareous quartz congflomerate and the 

 granite at Kingfston Mills railway cut. Horizontal and vertical scales equal. 



those obtained close to it. Neither rock has undergone any changes 

 such as might be expected were the granite a post-sedimentary 

 intrusion. 



On the southwest flank of the same hill, at a slightly higher 

 elevation, is a small exposure of a compact, fine-grained, gray liine- 

 stone, with a conchoidal fracture, and in close proximity to the granite, 

 which can be followed around it. A quarter of a mile west the lime- 

 stone beds in the valley are fifteen feet in thickness. 



Three and two-thirds miles almost directly south of this, at Fort 

 Hill, on Barriefield common, midway between the Gananoque road and 

 the river shore, occurs an ovoid quaquaversal dome with a gneissic 

 core. The direction of the main axis of the dome is about northeast. 

 The strike of the gneissic structure is about east and west, while the dip 

 is almost vertical. The limestone forms a low infacing ridge, in places 

 broken down. The maximum dip, sixteen degrees, occurs on the 

 southwest side of the dome, but rapidly becomes less as one recedes 



