GEOLOGICAL NOTES — MACDONALD. 339 



Along the side of the cliff the road descends at an angle of about 

 45°, in many places cut in the face of the rock. 



This formation is grey limestone, in layers of from 6 to 8 in- 

 ches in thickness, separated by bands of greenish shale, and much 

 shattered. In many places it rises in sharp pinnacles, presenting 

 a grand castellated appearance. 



During the spring months the road is abandoned for a more 

 circuitous route by boats around Cape Gaspe, travel being too 

 hazardous from the continual falling of debris along the face of 

 the mountain. 



From the foot of Cape Bon Ami towards Cape Rosier the coast 

 is low and shelving. 



From the violence of south-east gales the entire distance be- 

 tween those Capes is covered with grey limestone shingle, except 

 at Cape Rosier lighthouse. This magnificent structure, which is 

 the finest in the Gulf, is built upon strata of grey limestone, with 

 alternate bands of conglomerate resembling that of Perce Moun- 

 tain. 



The whole is interstratified with black and grey shales. 



At the base of the light house I counted upwards of 20 veins 

 of calcareous spar, from one to three inches in width. Some of 

 these contain cubes of galena. 



From this point north-west the character of the shingle 

 changes to that of granitic gneiss and shales, which are probably 

 of Archaean age. 



At several places along the shore toward Griffin Cove, where 

 it is possible to remove the shingle, there are seen deposits of 

 black ferruginous sand. 



At Mr. Whalen's, in the vicinity of Cape Rosier, I was shown 

 a large pan of this material, taken, from an embankment for in- 

 spection, on my return from Griffin Cove. 



From the magnetic character of this sand, and its appearance- 

 under the glass, I believe it to be same as that of the Moisie 

 river deposit, shown to me by Capt. LeMeasuer, at Cape Gaspe. 

 It is probably derived from the granitic gneiss. 



