130 KOYAL SOCIETY OF CANADA 



;ind quartzites of James river (and Eigg Mountain)."^ They are 

 described as greenish gray, flinty, rubbly slates and quartzites — red and 

 green splintery pyritoiis slates (on Gulf Road) — grayish and greenish, 

 reddish, jointed tough flaggy quartzites (on the shore of the Gulf of 

 St. Lawrence), dark slates with light gray bands finely jointed. 



Such sediments as these may very w^ell have been thrown down in 

 deeper waters than those in which the Goldenville terrane was deposited, 

 and where the agitation of the water was not sufficient to hold even the 

 smaller silicious particles in suspension; hence the accumulation of 

 these dark, flinty slates. 



The Upper Hueonian Cycle. 



Among the Huronian rocks there remain to be considered the 

 " Kingston series." This immediately overlies the lower Huronian 

 rocks of King^s county. New Brunswick, that we have described above, 

 and to which the two lower divisions of the Kingston series of the 

 Canadian Geological report - described in this paper on a previous page, 

 have been attached. The remainder of the Kingston group consists of 

 distinctly effusive rocks, and while they form very prominent ridges and 

 cover considerable areas in southern New Brunswick, they are not neces- 

 sarily of prominence elsewhere. 



A synclinal of these volcanic rocks, if one may judge it to be a 

 syncline, though infrequent dips only are visible, is found at the Land's 

 End in King's county. New Brunswick, where the volcanics show a 

 thickness of about 8,000 feet, and on New River, in Chariotte county, 

 a monocline of these rocks has a greater thickness and a more regular 

 succession. The effusive masses here dip at a high angle to the southeast 

 and show much diorites and hornblende schists in the lower part, much 

 IVlsites in the middle, while tow^ard the top they have the appearance of 

 feldspathic schists and approximata in appearance to the feldspathic 

 schists of the Laurentian terrane to the south of them. 



Dr. W. D. Matthew, who has studied these rocks lithogically, de- 

 scribes the amount of alteration which they had undergone as compared 

 with those of the Coldbrook group, ■'' Ca.mbrian or Etcheniinian effu- 

 sives of St. John county, for which see a following page. He says: 

 " They are a group of volcanic rocks parallel to those of the Coldbrook, 

 but far more altered. The acid members are strongly sheared, often 



' Rep. Geol. Surv. Can., 1886, 18P. 



2 Rep. Proç. Geol. Surv. Can., 1870-1, p. 121. 



3 Effusive and Dyke Rocks near St. John, N.B. Contrib. Geol. Depart., 

 Columbia College, No. XXX, p. 209. 



