ORIENTATION of Lingulellas in the sandy shale at Young point, Cape 

 Breton, from middle division of the Etcheminian. 



Young point is situated at the north-eastern end of the Barachois 

 "Cambrian valley and therefore midway between the northern extremi- 

 ties of the two pre-Cambrian ridges that bounded this basin ; it might 

 therefore be expected to give reliable indications of a current if any 

 prevailed in this valley at the time these fossils were entombed, but 

 the result was quite at variance with that obtained on Indian brook, 

 as may be seen by studying the preceding table. 



The observations of the orientation of these shells were referred to 

 the cardinal point. If this be changed to correspond to the columns 

 used to show the orientation in the Indian Brook basin, we find an 

 average of valves pointing S.W. 138, N.E. 131, S.E. 102, N.W. 167. 

 The orientation, therefore, was not to the north-east, as in Indian 

 brook valley,but to the south-east, indicating that the current ran 

 chiefly in this direction. But only 32 above normal are oriented in 

 that direction, or only 77 per cent more than one quarter of the valves. 



A study of the table will show how exceedingly variable the courses 

 are. This extreme variability would be explained by the existence 

 here in Lower Etcheminian time of an eddy between two conflicting 

 currents, one coming out of the Barachois basin, and another more 

 powerful passing eastward across the end of the pre-Cambrian ridges 

 that bounded that basin. Such a current may well have existed, for 

 at present there are no pre-Cambrian rocks visible for a long way to 

 the north of Barachois basin, the space in front being occupied by a 

 wide extent of Lower Carboniferous and Carboniferous deposits. 



Supposed to 

 be due to 

 meeting of 

 two currents. 



Orientation at 

 Young point 

 extremely 

 variable. 



