divers at St. Paul, St. Lawrence Island, Fairway Rock, 

 and 1\ miles off Kivalina. These large biological collec- 

 tions have been stored at the University of Southern 

 California under the care of Dr. John Mohr, Biology De- 

 partment. 



Results and Conclusions 



Immediately after the expedition, a preliminary 

 report of the sea-floor data was made to NEL underwater 

 acoustics personnel, followed by personal consultations. 

 A final report was made on sub-bottom acoustic reflection 

 studies based on the general geology of the area, 1 and 

 data on sediments appeared in several reports and papers. 

 Finally the decision was made to publish the sea-floor in- 

 formation in the present form so that interested persons, 

 either in or outside the Laboratory, might have convenient 

 access to it. 



In the laboratory the sediments were analyzed and 

 measured for grain size, percentages of sand, silt, and 

 clay, density, porosity, grain density, sound speed, and 

 attenuation (see fig. 2 and tables 3-6). Figure 1, which 

 shows distributions of sediments in parts of the shallow 

 Bering Sea, is a combined chart from earlier work and the 

 samples of the 1960 NEL expedition. 17 ' 18 The profile lines 

 of figure 2 (A- A', etc. ) are located in the north, central, 

 and southern shallow Bering Sea; their exact locations ar& 

 classified. "l§fc 



The values of density and sound speed for the rock 

 underlying the sediments in the shallow Bering Sea are 

 estimates based on geologic assumptions of the rock types 

 present, and the values of sound speed from the literature; 

 they are shown in parentheses in figure 2. 



The tables and figures pertain to specific areas or 

 locations and, for the physical properties of the water and 

 sediment, to certain times of the year. This statement is 

 made as a word of caution against using the data for the 



19 



