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HEEZEN AND LAUGHTON 



[chap. 14 



Plain and the smaller Venezuela Abyssal Plain. The Venezuela Abyssal Plain 

 is much less well developed than the Colombia Abyssal Plain, probably largely 

 owing to its isolated ])osition with respect to the continent, and the Venezuela 

 Abyssal Plain may be largely fed from the Colombia Abyssal Plain via Aruba 

 Gap. A very narrow abyssal plain exists along the northern side of the 

 Venezuela Basin just south of the south coast of the Dominican Republic. 

 This feature is known as the Dominican Abyssal Plain. 



STATUTE MILES 

 10 20 30 ^0 50 



CONTOUR INTERVAL- 1500 FT 

 300 FT CONTOUR ADDED 



APRONS 

 BASIN PLAINS 



Fig. 15. Basin plains and aprons off Southern California. This summary chart is based on 

 detailed basin maps. (After Emery, 1960.) 



Between the Cayman Ridge and the south coast of Cuba lies the Yucatan 

 Basin. In the center of the basin is found an abyssal plain probably exceeding 

 2500 mi 2 in area and lying in depths of 2450 to 2550 fm. 



d. North Pacific marginal seas 



The marginal seas which lie between the island arcs and the continent in the 

 North Pacific area are floored by small abyssal plains. The largest is that of 



