39 



o 



3<y 



1 TTl I [ 1 I I n n I I Mil 1 L M I I [TT 



1 11 i I n I nm M 



30' 



74' 



30' 



73 



o 



37 



o 



<^(' 



m 



iz: 



.•v^ 



ti 1 1 1 1 M i triT n n iiti I [ M ittt 



^ 



) 



isffi^ 



ifc 



I II III IIIM III llllllM IIIIIM 



.■■r 



NAUTICAL MILES 



5 10 



9 19 37 



KILOMETERS 



A ' * 

 depth contours in fathoms ^ ,, 



1 1 1 1 1 1 1 1 1 1 1 (^1 1 M 1 1 1 1 1 1 1 1 1 1 1 ( 1 1 1 1 i 1 1 1 1 11 111 iTTffr 



75 



o 



M I I Ml [ it ! 11 H I I I il I II 1 I iTTT 



y : 



/ 



y 



^ 



:'>:^ 



CONTINENTAL SHELF PROFILE 

 38°20'N 



NAUTICAL MILES 

 20 1*0 6o 



180 



25 50 75 100 125 



KILOMETERS 



IM l i ni'lMIIIII II Mil I 



39 



,o 



-30' 



38 



,o 



-30 



II 11 I I nlllMI IITTT 



30' 



74 



o 



MiinniM 1 1 [II I 



30' 



73 



^37 



o 



o 



Figure 2. Details of survey area in the northern Chesapeake Bight, 1971-1977. 

 Cross-hatching shows area most extensively surveyed. Shaded rectan- 

 gles "D" and "P" indicate dump zones for DuPont acid and industrial 

 waste and Philadelphia sewage sludge, respectively. The number of 

 observation days in each of the lettered 30-minute quadrats is pre- 

 sented in Table 1. 



7 



