20 



Etcheniinian 

 section on 

 Steele brook. 



Plateau of 

 Cambrian 

 rocks in 

 Indian brook 

 valley. 



No lower beds than these could be determined. 



The 25 feet bed of slate comes down to the waterline about 150 feet 

 east of Young point and then borders the shore for some distance. 

 The dip then changes and the lower slates and grit reappear and dip 

 S. 70 W. mag. < 70. Further on the dip is S. 30 W. mag. < 30. 

 Then after a space where there are no exposures, one comes to the gray 

 flaggy beds above mentioned which appear also in the railway cuttings. 

 Here the dip is S. 50 E. mag. < 70. 



The fossils from this shore are described in the Paleeontological sec- 

 tion of this report. 



Exposures of what appear to be Etcheminian sediment are des- 

 cribed by Mr. Fletcher as occurring on Steele brook, a small affluent 

 of McLeod brook near its source. They are described at page 429 of 

 the Report of Progress for 1876-7. Nos. 1, 4 and 7 have the characters 

 of the strata of this part of the Cambrian system. On the supposition 

 that the limestone and felsite are introduced into the Etcheminian 

 rocks by faults, this reference of the numbers above quoted would be 

 admissible. In connection with his description of the rocks of No. 3, 

 of this section, Mr. Fletcher suggests the existence of a fault. This 

 section would be unintelligible otherwise, as the natural position of 

 the sandstones, if Etcheminian, is 1,000 feet or more below the black 

 and gray shales of the bottom of the valley. These sandstones then 

 appear to have been raised that distance above the St. John terrane, 

 which fills the bottom of the valley. 



The basin of Cambrian rocks in the valley of Indian brook is just 

 such a narrow trough as that of the Barachois basin, but the structure 

 of the beds is entirely different. In the Barachois basin we trace an 

 ascending series from the base of the Etcheminian at George river 

 station to the head of McLeod brook, but on Indian brook the Cam- 

 brian rocks show an upward succession from the basal beds on the 

 north-west side of the valley to the higher Cambrian beds on the 

 south-east side. In this narrow valley the three terranes of the Cam- 

 brian stand on edge or as a series of vertical beds which form a plateau 

 on the western side of the valley, while Indian brook runs in a deep 

 and narrow trench along the eastern side. The valley is closed in on 

 each side by higher plateaux of pre-Cambrian rocks consisting of cry- 

 stalline limestones, felsites, various schists, and some beds of black 

 flinty slates, the whole of the pre-Cambrian being cut, broken up and 

 altered by great masses of intrusive syenite, also of pre-Cambrian age. 



Owing to the elevation of the Cambrian plateau in this valley and 

 the short courses of the brooks after they descend from the pre-Cam- 



