54 H0NEYMAN GEOLOGY OF ANTIGONISHE COUNTY. 



the band of diorite as in the last section having a width of ieet. 



An abrupt descent brings us into "Bruin's Highway." Here 

 evidences of Bruin's depredations are met with. All rocks are 

 obscure until we ascend to the sides of McDonald's mountain. 

 Occasional outcrops of slates are seen with diorite. The elevation 

 at this point is 1000 feet. Passing over the petrosilex band, all 

 becomes obscure. On the mountain road leading from Arisaig to 

 Antigonishe there is an outcrop of granitoid rock which may be 

 regarded as a continuation of our section. 



Section 7th. — Mountain Pass along Doctor s Brooh. 



Passing along the band of red and grey slates from the last line 

 of section westward; these seemed to terminate, great diorite rocks 

 taking their place. These in turn terminated before reaching 

 Doctor's Brook. 



Beginning at the bend of the brook we have elevations with 

 slates and diorites. Then comes the obscure interval which takes 

 the place of the diorites as already described. Crossing the 

 brook as it passes into the mountain, we follow the road along its 

 eastern side. The rocks are obscure. Approaching the site of a 

 saw mill diorites appear on the road side. In the section these have 

 a width of feet. Climbing the diorite as it rises towards Mc- 

 Donald's mountain, a beautiful piece of rock scenery stands out 

 before us. Titanic masses are piled one upon another in magnifi- 

 cent order. Masses hoary with lichens and moss, and crowned with 

 gnarled trees, their naked roots clasping the rocks and entering 

 the crevices. This diorite extends a considerable distance up the 

 mountain side. 



Extending the line of section we have outcrops of the mountain 



slates extending to a distance of feet. Then follows a 



section of the petrosilex band, showing a thickness of feet. 



This band rises boldly on the east toward McDonald's mountain. 

 Doctor's Brook now crosses the road and passes to a short distance 

 in rear of the ridire, turning again southward at no great distance 

 the brook is lost. 



