Table 3. Synoptic table of bottom samples collected 



Sam- 

 ple 



Sta- 

 tion 



Date 



Position 



and 

 depth in 

 meters 



Type of sample 



Estimated 

 CaC03 con- 

 tent in per 

 cent; basis 

 of estimate 



Color and physical characters 



72 



73 



142 



145 



74 146 



75 



147 



(Moist) raw umber 17m(0-Y) 

 (Slightly moist) clay (U.S.B.S. 

 class = clay); coherent, plastic 



(Dry) wood-brown 173(0-Y) 

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

 herent, brittle 



(Moist) mummy-brown 17lm(0-Y) 

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

 erately coherent, brittle, when 

 dry 



(Dry) between fuscous and fus- 

 cous-black 134l(OY-0) 



Sandy silt; angular grains of man- 

 ganese; slightly coherent, gritty 



76 



148 



77 149 



19 



21 



24 57 N 



137 44 W 

 4835 m 



21 18 N 



138 36 W 

 5320 m 



Red clay 



Red clay 



< 1; inspection 



0.72; acid 

 soluble CaO 



(Moist) olive-brown 173k(0-Y) 

 Clay; coherent, plastic 



(Dry) drab 17'*(0-Y) 

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

 herent, brittle 



78 150 23 16 15 N Red clay (?) <1; inspection (Dry) between dark Quaker-drab 



137 06 W and sooty-black l^Ured) 



4553 m Two cinders of volcanic rock 



coated with manganese. Average 

 diameter approximately 1 cm 



79 



151 



25 



12 40 N 



137 32 W 



4918 m 



Radiolarian ooze 



1; acid solu- (Moist) near wood-brown; 

 ble CaO 17-"l/2(0-Y) 



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

 erately coherent, slightly plas- 

 tic, sticky 



80 153 29 7 45 N Radiolarian ooze Trace; acid (Moist) Saccardo's umber 



141 24 W soluble CaO 172k(0-Y) 



5003 m Clay (U.S.B.S. class = clay); few 



shells of foraminifera; moder- 

 ately coherent, slightly plastic 



Sample 72. Contains large amounts of siliceous organisms including radiolaria, sponge spicules, and arena- 

 ceous foraminifera; a few pelagic foraminifera and fish teeth are also present. Inorganic constituents of 

 sand grades include pumice (in grains ranging up to 3 mm in diameter), manganese grains, feldspar, and 

 hornblende. 



Sample 73. Sand grades are small in amount. Organic remains include radiolaria, sponge spicules, are- 

 naceous foraminifera and a few fish teeth. Manganese grains are common; other constituents of sand 

 size are fresh and partially altered feldspar, hornblende, brown mica, and augite. 



Sample 74. The small amounts of sand grades contain radiolaria, sponge spicules, fish teethj arenaceous 

 and pelagic foraminifera, also abundant manganese grains, pumice (often stained red brown), feldspar, 

 and fractured euhedral grains of magnetite. 



Sample 75. Consists of opaque angular grains of volcanic ash (less than 2 mm in longest diameter), coated 

 with manganese, together with angular manganese grains, reddish-yellow, irregularly shaped, birefrin- 

 gent aggregates (beidellite), rare plagioclase feldspar, and considerable iron oxide. 



Sample 76. Small, fine-grained sample, contains much birefringent material, also basic volcanic glass, 

 small irregular grains of calcium carbonate of unknown origin, plagioclase feldspar, augite, needles of 



276 



