454 H0NEYMAX OX GEOLOGY OF NEW BRUNSWICK. 



among rocks, rivers, wilderness, horse flies and mosquitoes, per- 

 fectly enchanting. 



The rocks exposed on the sides of the Tattagouche, and in a 

 cutting of the I. C. R. beyond it, showed that we had passed the 

 boundary of the carboniferous formation. It is to the geoloo-y of 

 the region that the Tattagouche is indebted for its salmon-holes. 

 These have been formed by direction given to the waters and the 

 eddies made by jutting rocks. These rocks are slates of uncertain 

 age ; I have little doubt from their lithological character that they 

 are of upper silurian age. I failed to discover any fossils in them. 

 The first of the slate exposures occur a little above the Railway 

 Bridge. Up the river about nine miles from this point are seen 

 the Falls of Tattagouche. The rocks of the falls and on either side 

 of the river for some distance below the falls are lofty and pre- 

 cipitous ; they consist chiefly of red and grey slates, cave adits, 

 and other arrangements, show that this has been the scene of 

 mining operations. Cupper and other metals were sought for in 

 these rocks in economic quantity, but without success. These 

 rocks also are of uncertain age; they are probably upper silurian. 



I have referred to a Railway Bridge on the Tattagouche. The 

 quietness of Somerset Yale is soon to be disturbed by the noise of 

 the railway. The I. C. R. passes through the vale, and crosses 

 the Tattagouche by a magnificent iron bridge. The top of it is 

 sixty feet above the river, and seventy feet above the sea level.. I 

 give this measurement as I intend to make a practical use of it in a 

 subsequent part of this paper. 



In the second cutting across the bridge are the only remaining 

 rocks met with in this locality. These rocks are crystalline 

 diorites, homogeneous, porphyritic and amygdaloidal. I did not 

 ascertain their relation to the Silurian slates of the Tattagouche. 

 They are also seen outcropping on the post road, making them- 

 selves uncomfortably felt by the jolting of the carriage. 



Exposed rocks are therefore a rarity in this region. The carbon- 

 iferous rocks to the south of Tattagouche lie at a gentle inclination, 

 and the older and harder rocks are much covered by drift. The 

 magnificent pillars of the new bridge across the Tattagouche are 



