120 



ALFRED W. G. WILSON 



about 6 feet above present water level, or at least 8 feet above 



the bottom of the lagoon. The beach on the west is only about 



2 feet high, except near the apex of the spit. 



A reference to the general map will show that immediately to 



the east of the point we have a gap — the Upper Gap — in the 



side of the Bay of Quinte 



valley, through which 



storm waves from the 



open lake can have access 



to the bay. The waves 



which will have most 



effect on the shore are 



those coming from a little 



to the east of south, 



although the waves of a 



storm from the east or 



south will also be capable 



of effective work. On the 



Fig. 7. — Sketch plan of about loo feet of the other hand, the Spit is 



apex of the Pleasant Point spit, May 23, 1903, exposed on the west 

 showing the shifting beach ridges and terraces. 



only to waves travelmg 



up the bay before a wind having a very limited distance in 

 which to act. Hence we find that the larger waves from the 

 open lake have been steadily carrying material around the 

 point, and depositing it in the slack, but very deep, water behind. 

 The point of the spit is now out as far as the 70-foot contour. 

 The much larger size of these waves has been the important fac- 

 tor in determining the coarseness of the material of the eastern 

 part of the spit, in piling it so high, in determining the amount 

 which has been brought here, and in causing the spit to travel 

 slowly eastward. The material which forms the west arm is in 

 part derived from that brought by the bigger waves to the east 

 side and subsequently carried around the point, partly by the 

 same system of waves which brought it, but chiefly by the waves 

 coming up the bay from the northeast at other times. Some of it 

 is brought from the shores to the west. One record of the changes 

 which take place at the apex of the beach under the action of 



