honeyman on the metamorphism of rocks. 231 



Description of the Plate. 



Nos. 1, 2, 3. Arrow heads, full size, barbed, unbarbed. 



4. Knife blade, half size. C Restored to modem handles as the Indians 



. < now make them, substituting a piece 



5. Axe, halt size. ^ of iron. 



6. Unmistakable lance head, half size. 



7. Pipe, upper part bowl, half inch. 



8. Small wedge or hand axe, half size. 



9. Serpent stone, half size. 



10. Round plummet stone, half size, use unknown. 



Art. y. On the Metamoephism of Rocks in Nova Scotia 

 AND Cape Beeton. By Eev. D. Honeyman, D.C. L., 

 F.G. S., &c. 



{Read Feb. 10, 1873.) 



All the pre-carboniferous rocks of Nova Scotia and Cape Bre- 

 ton are metamorphic ; all in some degree have been subjected to 

 regional metamorphism of greater or less intensity. Some in addi- 

 tion have been subjected to local metamorphism. From extensive 

 observation I have been led to this conclusion. I find the Middle 

 and Upper Silurian having metamorphic characters of a certain 

 kind, which as a whole may be termed metamorphism of the third 

 deoTce. I find the Lower Silurian having different characteristics, 

 which dispose me to rank this metamorphism as of the second de- 

 gree ; and I find Cambrian or Laurentian as having other charac- 

 teristics which give their metamorphism the first rank. I also find 

 a local metamorphism of rocks in the third degree, which elevates 

 them from the third degree to the second, leading to the inference 

 that the virtual cause of this local metamorphism has, under certain 

 conditions, effected all metamorphism, whether of the first, second, 

 or third degree. 



In my last paper I noted as the western boundary of the Lower 

 Arisaig Series of crystalline rocks, the trap and conglomerate of 

 Malignant Cove and Brook. Here the trap from north to south 

 has a breadth of about half a mile, as shown by its outcrops in the 

 brook, on the road, and in the adjoining fields. Isolated by this 



