1 92 A. C. I.AW.-uN — RELATIONS OF THE A i;< II KAN OF CANADA. 



The Byenites of the southeast coasl of Norway, also, which have been studied 

 particularly by Brogger, and which arc irruptive through fossiliferous 

 Silurian and Devonian strata, arc eminently gneissic in places. They are in- 

 distinguishable in this respect from the more distinctly foliated varieties of 

 our Laureiitian gneiss. 



Lehman's masterly work* on the rocks of Saxony and other geologically 

 similar regions has clearly established that many of the gneisses of central 

 Europe are irruptive in their origin. 



The foliated gabbros or gabbro-gneisses of the Lizard are regarded a> 

 eruptive by such eminent observers as Teallf and McMahon,J though they 

 differ as to the precise mode of the development of the foliation. 



Harper § has shown that the "granite and gneissic granite" df Lam, 

 ( !aernarvonshire, which was formerly held to he Archean, is in reality irrup- 

 tive and of more recent age than the Upper Areuig strata : 



The actual contact of the two rocks is easily found, and the granite is seen to send 

 out little tongues between the laminae of the shale. Specimens of the latter reek, 

 indurated and firmly adhering to the granite, may be obtained. * * * The Bhale 

 is clearly altered and exhibits little spots and nodules supposed to represent the in- 

 cipient development of chiastolite. Another quarry, well within the boundary of 

 the granite, shows entangled masses of baked shales." 



In a paper submitted to the International Geological Congress at its Lon- 

 don session j| in L888, the writer quoted Dr. G. M. Dawson • at some length 

 tH -how how entirely the conditions which obtain between the Triassic rocks 

 of the west coasl and the younger subjacent irruptive granite are analogous 

 to those which obtain between the rocks of the upper Archean or Ontarian 

 system and the Laureiitian granite gneiss. Dr. Dawson's account of the 

 history of geological events in that region in post-Triassic times confirms 

 the correctness of the writer's interpretation of the Archean of central 

 ( lanada. 



The interesting nostical equivalent of the Archean on the Pacific 



coast is paralleled on the Atlantic coast by the great irruption of "gneissic 

 granites" which in post-Cambrian times, possibly as late as the Devonian, 

 have broken up through the Cambrian Blates and quartzitee These 



oeissic granites" are indistinguisable from many of the Laureiitian 

 gn< is8< a. 



atersuchungen Qber die ESntatehung der altkrystalllnischen Schlefergesteine, Bonn, 1881 



M)rlij I Mag., N. 8., Decade III, Vol. IV, 1887, p. 484. 



[On ( he Foliation •■! i In Id , p 71. 



et. Jour. ' , \ ol. XXXI V. 1878, p. u: 



I 

 i i \ nnual itepoi t, 1887, Pari B, pp 1 1 1 : 



rouRh and Halifax Countie By E. K. Faribault; 



i Annual Report, i 



