60 STETSON 



FEET 



20 40 60 80 100 120 140 160 180 200 220 



FEET 0_ , 



\ 



^^ HIGHLAND 



\^,^ v^^^ OCTOBER 14 



"^^v ^\ OCTOBER 27 



^V"^-^ .'v \ NOVEMBER 17 



I0_ 



WATER UNE 

 -3 HRS. 21 MINS. AFTER LjOW WATER 



I5_ 



\ \ WATER LINE 



\ \ I HR. 54 MINS. 

 _ X 10 \ \_AFTER LOW WATER 



\ 

 — \ 



_ \_LOW WATER LINE 



Figure 5. Highland traverse showing changes in the foreshore and 

 backshore. Note the marked cutting between Octobe 14 and 27, with 

 partial restoration by November 17. 



2.0 40 60 80 100 120 140 160 180 200 220 



HIGHLAND 



OCTOBER 14 



OCTOBER 27 



NOVEMBER 17 



WATER LINE 

 ^. ^>c— 3 HR& 21 MINS. AFTER LOW WATER 



WATER LINE 

 IHR. 54MINS. 



— ^ iO \ N_AFTER LOW WATER 



\ 



— \ 



_ \_LOW WATER LINE 



Figure 6. Duxbury traverse showing slight fill on the backshore and 

 cutting on the foreshore. This is a relatively stable beach. 



The emerged portion of the profile also shows considerable change of form. One of the 

 most striking features which may appear very suddenly is a steepening of the beach profile with 

 the cutting of a vertical scarp at the seaward edge of a berm. This scarp is usually of small 

 dimensions but may, on a steep beach, be several feet high and, because the sand is loose, dif- 

 ficult for a man to scale. It cannot be stated at present with any degree of certainty just what 

 wave conditions are responsible for this cutting on the beach face but they are thought to be 

 correlated with short, steep seas (Figs. 7 & 8). 



A series of aerial photographs have been taken on four flights from a PBY which is at- 

 tached to the Oceanographic Institution. The flights covered the entire length of the outer Cape 



