The distribution of carbonate on the nine transects followed the 

 same pattern as total carbon and organic carbon. There was a decrease 

 in values from east to west. The average value on transects 1, 2, and 

 3 was 0.119 percent; transects 4, 5, and 6 had an average of 0.087 

 percent, and transects 7, 8, and 9 averaged 0.042 percent (Table 11). 



h. Mean Grain Size . The average mean grain size from all transect 

 stations was 1.918 phi (0.273 millimeter) (Table 9). Sediments with 

 these mean grain sizes were classified as sand (Table 2) . The range of 

 mean grain-size values was 0.777 to 2.488 phi (0.178 to 0.584 

 millimeter) . Over 87 percent of stations occurred in the range of 

 1.51 to 2.50 phi (Fig. 16); 96 percent of the stations had a mean grain 

 size between 0.11 to 0.4 millimeter (Fig. 17). 



The mean grain size of the surface sediments gradually decreased 

 as distance from shore increased. An exception was at station 3, 

 where the sediments averaged slightly smaller than stations 4 and 5 

 (Table 12) . Sediments at stations A and B had average mean grain sizes 

 smaller than the transect stations (Table 13). 



The average mean grain size of sediments on each of the nine 

 transects ranged from 1.814 to 2.004 phi (0.253 to 0.297 millimeter) 

 (Table 14) . There was a slight decrease in mean grain sizes from 

 transects 1, 2, and 3 and then an increase in values from transects 

 3 to 9. 



i. Standard Deviation . Surface sediments at all transect stations 

 had an average standard deviation of 0.608 phi (Table 9) and were 

 classified as moderately well sorted (Table 3). The range of values 

 from transect stations varied from 0.321 to 1.119 phi. Over 64 percent 

 of the stations occurred in the bracket classified as moderately well 

 sorted; almost 17 percent of the stations were present in each of the 

 well-sorted and moderately sorted classifications (Fig. 18; Table 3). 



The average of all samples taken at each of the five transect 

 stations was in the moderately well sorted classification. Sediments 

 at station 3 were better sorted than the remaining stations; station 

 2 had the poorest sorting of sediments (Table 12). Sediments at 

 stations A and B were also moderately well sorted with an average of 

 0.638 phi (Table 13). 



The average standard deviations on each of the nine transects 

 ranged from 0.566 to 0.669 phi. Transects 1, 2, and 3 had sediments 

 that had higher standard deviations than the remaining transects and, 

 therefore, were slightly less sorted (Table 14). 



39 



