[MATTHE V] GEOLOGICAL CYCLES IN MARITIME PROVINCES 181 



unrecognizable as volcanics, and with a great development of secondary 

 micas, making a quaxtzose or feldspathic mica schist. Ash rocks now 

 changed to flinty felsites are sometimes still recognizable. The basic 

 rocks are even more changed. Though mostly less cleaved they are 

 coarsely crystalline hornblende schists, with no traces of their original 

 structure visible under the microscope, Eemnants of the porphyritic 

 feldspars sometimes still appear as white spots scattered through the 

 dark schists, but their original form is lost." 



Eesting unconformably on the flinty slates of James river, referred 

 to on a previous page, Mr. H. Fletcher found two groups, largely of 

 volcanic elastics, which may be parallel in age to these Kingston or 

 Upper Huronian rocks. One he calls the " Soft slates of Baxter and 

 Brian Daly Brooks," ^ the other the " Reddish gray sandstone, grit and 

 conglomerate of Bear Brook." - One or both of these may be equiva- 

 lent in age to the Kingston volcanics of the neighbouring province. 



The Baxter Brook rocks are further described as greenish, smooth, 

 somewhat pearly argillites and fine gray micaceous sandstones — slaty 

 porphyritic felsite followed by red and green mottled, soft, friable 

 slates — also greenish and reddish flinty fine-grained, or compact friable 

 sandstones. 



The Bear Brook rocks are further described as reddish gray, very 

 flinty conglomerate or quartzites and gray red spotted compact porphy- 

 ritic felsite, with green and gray or bluish striped splintery slates. 



Here we would place the Signal Hill sandstones of Alex. Murray, 

 which skirt the Atlantic Coast in front of St. John's, Newfoundland, 

 and show a thickness of 3,000 feet or more. "We have found red sand- 

 stones nor infrequently associated with volcanic deposits as levigated 

 effusives, though the oxidation of sandy and clayey strata may be due 

 to other causes. 



Falling into this gap is another set of gray and reddish sandstones, 

 seen on Smith's and Eandom sounds, in Newfoundland, and containing 

 over 1,000 feet of strata. Secretary Walcott, of the Smithsonian 

 Institution, who has named this group the Random terrane, found it 

 to overlie the Signal Hill sandstones. 



Although both these groups show much quartzose strata they lack 

 the dark gray slates which characterize the Maguma series at top, and 

 is also found in the St. John slates of Newfoimdland ; hence the two 

 groups of sandstones above described are more probably Upper 

 Huronian. 



1 Rep. Geol. Surv. Can., 1883, p. 22P. 



2 Ibid, p. 33P. 



