224 



iGiomlfres ^^^ channel is sharp, and indicates abandonment 

 at a very recent period. 



The relation of drift cap to rock wall can be 

 seen fairly well in the contours of the valley 

 walls, and both are laid bare by the cutting of 

 Black river just opposite Riversdale station. 



Apparently the rock gorge has been cut en- 

 tirely subsequent to the accumulation of the 

 gravels. No evidence has been seen of an older 

 set of channels cut prior to the gravel stage and 

 covered by the gravels, to be later uncovered to 

 form in part the present gorge. 



From the edge of the Triassic area at Salmon 

 Siding, eastward almost to Union station, a 

 distance of about 2 miles (3-2 km.), the dom- 

 inantly red beds of the Union formation are 

 shown, almost continuously, in numerous long 

 rock cuttings, with an easterly dip of about 25°. 



9 m. Union Station — Alt. 218 ft. (66-4 m.). In 



14-5 km. the rock cuttings west of Union station, the 

 beds are on the western limb of a syncline, the 

 highest beds of which are located just west of 

 Union. Eastward from Union, the direction 

 of dip is reversed, and lower and lower beds are 

 exposed until the passage into the underlying 

 Riversdale is reached a short distance west of 

 Riversdale station. The contact between the 

 Riversdale and Union is not a sharp one, and it 

 is nor clear why Fletcher drew it at this point. 

 It appears, however, that the boundary must 

 be arbitrarily chosen. 



12-7 m. Riversdale Station — Alt. 314 ft. (95-7 m.). 



20-4 km. West of Riversdale station, the rock cuttings 

 are in the grey rocks of the Riversdale formation. 

 In the rock cuttings about |mile (o-8 km.) east 

 of Riversdale, fossils occur. In one cutting, 

 the fauna, large in individuals but few in species, 

 is found in beds of grey and black shale; at 

 this locality, Leaia and Anthrocomya occur. 

 In a rock cutting beyond this point, plant frag- 

 ments occur abundantly in a sandy shale. 

 Beyond the rock cuttings west of Riversdale 



