30 



MARINE BOTTOM SAMPLES OF LAST CRUISE OF CARNEGIE 



Table 1. Synoptic table of bottom samples collected 



Color and physical characters 



(Moist) between light brownish- 

 olive and brownish-olive 

 192l(Y-0-Y) 



(U.S.B.S. class=clay loam) 



52 109 



29 



23 22 N 



144 08 E 



5252 m 



Red clay 



<5; inspection (Dry) avellaneous 173b(0-Y) 

 Clay; moderately coherent, 

 crumbly 



53 110 



31 



54 111 



55 112 



56 113 



Jime 



25 



26 20 N 



144 24 E 



3036 m 



31 00 N 



144 16 E 



6008 m 



33 51 N 



141 15 E 



3931 m 



34 44 N 



141 04 E 



2911 m 



Volcanic globlger- 

 ina mud 



Brown volcanic 

 mud 



Gray volcanic 

 mud 



Gray sUiceous 

 volcanic mud 



48; total CO2 



5; total CO2 



< 10; inspec- 

 tion 



4; acid solu- 

 ble CaO 



(Dry) pale pinkish-cinnamon 



152f(Y-0) 

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



foraminifera; volcanic glass; 



slightly coherent, pulverulent, 



gritty 



(Moist) light drab 173b(0-Y) 

 SUty clay (U.S.B.S. class=silty 



clay loam); moderately 



coherent, pulverulent 



(Dry) between hair-brown and 

 deep grayish-olive 194i(Y-0-Y); 

 (moist) silt; angular grains; 

 slightly coherent, crumbly, 

 gritty feel 



(Moist) deep grayish-olive 



2l4i(0-YY) 

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



angular grains; moderately 



coherent, slightly sticky, 



gritty 



57 115 



29 



37 40N 



145 26 E 



5396 m 



Volcanic radiolar- 

 ian ooze 



1; acid (Dry) between buffy -brown and 



soluble CaO drab 173-l/2h(0-Y) 



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

 coherent, crumbly 



Sample 51. Organic remains include abundant pelagic foraminifera, common arenaceous and benthonlc 

 foraminifera, and radiolaria. Predominant constituents of sand grades are angular fragments of fresh 

 pumice (index of refraction about 1.50), fresh, dark-colored vesicular basic glass (index of refraction 

 about 1.56), quartz, plagioclase feldspar, and hornblende. 



Sample 52. Very small tine-grained sample. Organic skeletal material is scarce, chiefly radiolaria and 

 sponge spicules. Basic volcanic glass (index of refraction somewhat less than 1.545), vesicular pumice, 

 plagioclase feldspar (labradorite and some andesine), green augite, quartz, magnetite, manganese grains 

 and flakes, limonite, clay mineral similar to that described for sample 50, and much fine unidentified 

 material make up bulk of the sample. 



Sample 53. Similar to sample 51, except that pelagic foraminifera are much more abundant and pumice 

 fragments are replaced in the sand grades largely by vesicular basic volcanic glass. Quartz is abundant. 



Sample 54. The organic remains consist of radiolaria shells (sometimes coated with manganese), fish 

 teeth, occasional diatoms, sponge spicules, fragments of pelagic foraminifera, and arenaceous foramin- 

 ifera, the latter consisting largely of angular grains of feldspar, sometimes coated with iron oxide, and 

 volcanic glass. About 60 per cent of the sand grades is made up of pumice (index of refraction about 

 1.50), other inorganic materials are biotite, manganese grains, some basic volcanic glass, and plaglo- 



