-■ 1 — 



68* 20' 



I » I 



EXPLANATION 



40>30' • cuttcvT Hcreii 



— oM rHAvciw 



— NCT XDmUrt TUMTOaT 

 Q GUVCL PAVCWKT 



Figure 19. Map of Oceanographer, Heel tapper, and Filebottom Canyons located 

 on the southern margin of Georges Bank. Oceanographer is a large canyon, and 

 its shallow northern part incises the continental shelf for 25 km. By 

 contrast, Heeltapper is a small canyon that incises the shelf north of the 

 200-m isobath for only 3 to 4 km. Filebottom canyon is a slope canyon that 

 does not cut into the shelf. Dashed line is location of section in Figure 11 

 (adapted from Valentine 1987). 



81 



