SECT. 2] 



CONTIlSrENTAL SHELF AND SLOPE 



285 



depressions in the Scottish shelf are shallower than those in other glaciated 

 areas, the Minch and the channel between the Outer Hebrides and St. Kilda 

 (Ting, 1937) lie in a similar position. 



Outside the glaciated areas, along the southern California coast, the 

 continental shelf proper is restricted to a narrow coastal strip, 2 to 25 km wide. 

 Outside this shelf, however, a continental borderland may be defined as a 

 basin and range province, including 14 basins the bottom depths of which 

 range from 627 to 2571 m, and the sill depths from 475 to 1902 m (Revelle and 



erN 



4°E 



Fig. 4. Continental shelf near Bergen, Norway, with longitudinal depressions. Transverse 

 depression at entrance to fjords. (After H. Holtedahl, 1955.) 



Shepard, in Trask, 1939; Shepard and Emery, 1941; Emery, 1954, 1960). The 

 basins are often steep-sided troughs. The intervening ranges, which run parallel 

 to the coast in a NW-SE direction, include islands with fringing submerged 

 shelves. Finally, a typical continental slope is found after the outermost ridge 

 is crossed. 



There are various elevations on the continental shelves, of the same types as 

 those rising from the adjacent mainland. The hummocky topography in the 

 Gulf of Maine strongly resembles the glaciated landscape in North-east America. 



