Table 3. Synoptic table of bottom samples collected 



Sam- 

 ple 



Sta- 

 tion 



Date 



Position 



and 

 depth in 

 meters 



Type of sample 



Estimated 

 CaCOs con- 

 tent in per 

 cent; basis 

 of estimate 



Color and physical characters 



1929 

 65 132 Sep. i 



31 38 N 



128 48 W 



4251 m 



Red clay 



0.46; acid (Dry) between vinaceous-buff and 



soluble CaO avellaneous 173c(0-Y); (moist) 

 olive-brown 173k(0-Y) 

 Clay (U.S.B.S. class =clay); when 

 moist, moderately coherent, 

 moderately plastic, slightly 

 sticky; when dry, coherent, 

 brittle 



66 



133 



10 



67 



134 



12 



29 21 N 



132 20 W 



4426 m 



27 45 N 



135 22 W 



4528 m 



Red clay 



Red clay 



0.68; acid (Dry) between light drab and drab 



soluble CaO I7'la(0-Y); (moist) between raw 

 umber and mummy-brown 

 17l/2m(0-Y) 

 Clay (U.S.B.S. class = clay); co- 

 herent; when moist, plastic, 

 when dry, brittle 



<1; inspection (Dry) sepia 172m(0-Y) 



(Slightly moist) clay; coherent, 

 plastic (?) 



68 135 



14 



26 39 N 



139 07 W 



4695 m 



Red clay 



<1; inspection (Dry) avellaneous 17^b(0-Y) 



Clay; coherent, brittle, smooth 

 feel 



69 



136 



16 



70 



137 



71 



138 



20 



26 13 N 



142 02 W 



4713 m 



24 02 N 



145 33 W 



5208 m 



22 53 N 



151 15 W 



5382 m 



Red clay 



Red clay 



Red clay 



0.80; acid (Dry) between vinaceous-buff and 



soluble CaO avellaneous 173c(0-Y); (moist) 

 between snuff-brown and Sac- 

 cardo's umber 162k(YO-OY) 

 Clay (U.S.B.S. class =clay); co- 

 herent; when moist, moderately 

 plastic, slightly sticky; when 

 dry, coherent, brittle 



1; acid solu- (Dry) vinaceous-buff 173d(0-Y); 

 ble CaO (moist) between mummy-brown 



and Saccardo's umber 

 17l-l/2i(o-Y) 

 Clay (U.S.B.S. class = clay); when 

 moist, moderately coherent, 

 moderately plastic, moderately 

 sticky; when dry, coherent, 

 brittle 



<1; inspection (Dry) between tilleul-buff and vi- 

 naceous-buff 173e(0-Y) 

 Clay; coherent, brittle 



Sample 65. Sand grades are very small in amount, as in most north Pacific red clays. They consist large- 

 ly of radiolaria, arenaceous foraminifera,and sponge spicules, together with some flakes and grains of 

 iron manganese oxide, somewhat altered fragments of plagioclase feldspar (oligoclase), and fresh micro- 

 cline. 



Sample 66. Radiolaria make up about 70 per cent of the sand grades. Fragments of arenaceous foramini- 

 fera, sponge spicules, diatom frustules, and fragments of fish teeth are other organic remains. Manga- 

 nese grains and limonitic and manganese flakes, plagioclase feldspar (andesine), orthoclase, colorless 

 pumice, and one magnetic spherule, are other identified components of sand size. 



Sample 67. Small, fine-grained sample. Remains of organisms are rare- -a few diatom fragments. 

 Contains much birefringent material (clay minerals), also augite grains, hornblende needles and cleavage 

 fragments, green garnet (?), oligoclase feldspar (or quartz?), basic glass, and manganese grains. 



Sample 68. Very small, fine-grained sample. Remains of organisms are rare. Much birefringent ma- 



274 



