26. How did seas, such as the Black, Red, and White, get 

 their names? 



Because the Black Sea is landlocked, it is deficient in oxygen, except 

 near the surface. The high concentration of hydrogen sulphide causes 

 a reducing environment, resulting in a black color. 



Oddly enough, the recurring bloom of small blue-green algae (Tri- 

 chodesmium erythraeum) imparts the red color to the Red Sea. 



The White Sea received its name from the ice that covers it more than 

 200 days a year. 



The color of the Yellow Sea is caused by the yellow mud which is 

 carried by rivers, especially when floods occur. 



Miller, Robert C. 



The Sea, Random House, 1966. 

 Stewart, Harris B., Jr. 



Deep Challenge, Van Nostrand, 1966. 



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