Table 1. — Chemical and physical properties of bottom sediments 

 by stations 



Station 25 25 25 25 



Cruise 1 2 U 5 



Sample No. 253 208 150 528 



Latitude N. 30°20' 30°20' 30°20« 30°20« 



Longitude W. 80°35' 80*35' 80°35' 80°3^* 



Depth (meters) 33 33 3I 33 



Date (mo., day, yr.) 2-22-53 ^^-27 -53 10-15-53 2-5-5I+ 



Sediment Type Sa 3a Sa Sa 



Loss on Ignition, ^ I8.89 23.1i-l 25.57 21.52 



Insoluble Residue, ^ 55.14-8 1+6. 08 39-^9 ^9-97 



AI2O3, ^ 0.17 0.09 0.15 0.12 



Fe203, i 0.39 0.36 0.69 0.60 



MnO, i> 0.6k 0.05 O.OI+ 0.05 



MgO, ^ 0.83 0.95 0.82 0.88 



CaO, i> 2I+.59 27.70 30.83 28.78 



K2O, ^ 0.13 0.12 O.1I+ 0.114- 



P2O5, i 5.11 3.22 I+.IO 5-8'+ 



sr, ^ 0.39 0.51 o.eh 0.61 



CI, i> 0.3U 0.1+0 0.1+5 0.39 



Organic Nitrogen, i> 0.012 



Organic Carbon, ^ 0.121 



CaC03, i> k9.^ 



Gravel, ^ 0.1+5 2.3I ^+-06 O.5I 



Sand, ^ 98.97 97.^6 95.73 99.39 



Silt, <f> 0.58 0.23 0.21 0.10 



Clay, i 0.00 0.00 0.00 0.00 



Median Diameter (mm) o.l+l O.5I 0.62 O.hh 



Sorting (Trask) 0.86 O.9O O.98 0.82 



First Quartile (mm) O.6I 



Third Quartile (mm) 0.32 

 Sieve Weight, ^ (mu) 



+ 2000 0.1+5 2.31 1+.06 0.51 



+ 1000 3.27 9.50 17.91 7.56 



+ 500 29.09 35.57 ^0.39 27.50 



+ 250 5I+.65 U5.6I 32.03 53.59 



-+ 125 10.95 6.36 1^.77 10.09 



+ 62 1.01 0.1+2 0.63 0.65 



- 62 0.58 0.23 0.21 0.10 



Heavy Mineral, % O.5I 



Light Mineral, ^ 99.1+9 



Bioclastic, ^ Sh 



47 



