wai.cott.', NOVA SCOTIA 57 



is shown and in the legend they are noted as "perhaps altered Lower 

 Silurian" strata. 



In a supplementary chapter to the first edition the slates and quartz- 

 ites of the Atlantic coast belt are spoken of, and it is suggested that 

 they may be a continuation of the Primordial zone of Newfoundland, 

 in which Paradoxides have been found. 1 Mr. E. Billings reviews this 

 supplementary chapter and says : 2 " We are strongly inclined to the 

 belief that this supposition will yet turn out to be well founded." 



In 1862 the slates of the Nova Scotia metamorphic slate belt were 

 referred to the Tacouic System. 3 A more detailed description of the 

 rocks was published by Dr. J. W. Dawson, in 1868, in which they are 

 stated to be formed of granite, gneiss, mica slate, quartz rock or quart- 

 zite, and clay slate. The granite appears to be intrusive, and the gneiss 

 is considered a product of a metamorphism or baking of sedimentary 

 rocks. The clay slate or argillaceous slate abounds, and is usually, 

 along the Atlantic coast, of a gray and black color, varying very much 

 in texture and hardness. 4 He states that the series has not afforded 

 fossils, but it appears to be a continuation of the older slate series of 

 Mr. J. B. Jukes in Newfoundland, which has afforded trilobites of the 

 genus Paradoxides. On the map accompanying the volume the geo- 

 graphic distribution of the series is clearly exhibited. 



In a general description of the Nova Scotia gold field Mr. J. Camp- 

 bell 5 publishes a section across the gold-bearing rocks of the Atlantic 

 coast, in which the arrangement and relative position of the different 

 groups of strata are well shown. There is a great thickness of quartz- 

 ite subjacent to blue and gray slates divided midway by the "black 

 rock." Very few details are given of the sectiou, as the report is 

 mainly devoted to a description of mining and the mode of occurrence 

 of gold. 



When reporting upon the Waverly gold district Prof. H. Y. Hind 

 stated that he had found Palccotrochus minor and Pahvotrochus major of 

 Emmons, besides numerous concretionary forms, in the Waverly beds. 

 He considers (a) that these fossils, if identical with those from North 

 Carolina, probably establish the age of the gold-bearing rocks of Nova 

 Scotia $ (b) that they occur near the base of the Lower Silurian System ; 

 (c) that they belong to the upper part of the Potsdam formation and 

 the lower part of the Calciferous formation, and (d) that they are sub- 

 jacent to the great mass of serpentine and red slates, discovered by 

 Dr. Honeyman in Antigonish, which belong to the Quebec group. The 

 gold series is correlated with that described by Dr. Emmons in North 



1 Supplementary chapter to the Acadian Geology, Edinhnrgh, 1860, p. 53. 



'[Review of) Acadian Geology and a Supplementary Chapter thereto. Canadian Nat., vol. 5, 1860, 

 pp. 450-455. 



3 Marcou, Jules. [The slate of Nova Scotia, metamorphic Taconic rock.) Boston Soc. Nat. Hist., 

 Proc.,vol.9, 1862, p. 47. 



♦Acadian Geology. The geological structure, organic remains, and mineral resources of Nova Scotia, 

 New Brunswick, and Trince Edward Island, 2d. ed. London, 1868, pp. 613-615. 



6 Report on the Gold Fields of Nova Scotia. Halifax, 1863, pp. 12. 



