18 



MARINE BOTTOM SAMPLES OF LAST CRUISE OF CARNEGIE 



Table 1. Synoptic table of bottom samples collected 

 For discussion see footnotes on 



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 



1928 

 10 37 Nov. 1 



5 59 N Green (coprolitic) 3; acid solu- 

 82 56 W mud ble CaO 



3324 m 



(Wet) grayish-olive 2l4(0-YY) 

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

 rounded grains; moderately co- 

 herent, slippery, granular 



11 



12 



40 



42 



1 32S 

 82 16 W 

 1344 m 



Volcanic gravel 



13 1 32 S Siliceous globiger- 



93 10 W ina ooze ? 

 3539 m 



5; inspection (Dry) from near deep mouse- 

 gray 155i(y-0) to pinkish-buff 

 172d(0-Y) 

 Angular rock fragments; (Went- 

 worth class=sandy gravel) 



30: inspection (Dry) tUleul-buff 173f(0-Y) 



Clay; few shells of foraminif era; 

 slightly coherent, pulverulent 



13 



14 



43 



44 



15 



46 



15 2 30 S SUiceous globiger- 



95 43 W ina ooze 

 3352 m 



17 3 15 S Siliceous globiger- 



99 48 W ina ooze 

 3423 m 



21 9 06 S Volcanic globiger- 



108 20 W ina ooze 

 2905 m 



67; total C02 



76; acid solu- 

 ble CaO 



80; inspection 



(Moist) buffy-brown 173i(0-Y) 

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

 small shells of foraminifera; 

 moderately coherent, slightly 

 plastic, crumbly, granular 



(Moist) between sayal-brown and 

 tawny-olive 162i(Y-0, O-Y) 



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

 small shells of foraminifera; 

 moderately coherent, slightly 

 plastic, crumbly, granular 



(Wet) avellaneous 173b(0-Y) 

 Silty sand; small shells of fora- 

 minifera; incoherent, granular 



16 



47 



17 



49 



23 14 07 S Ferruginous glo- 



111 50 W bigerina ooze 

 3080 m 



27 23 16 S Ferruginous (vol- 



114 45 W canic) globigerina 

 3098 m ooze 



87; acid solu- 

 ble CaO 



74; acid solu- 

 ble CaO 



(Dry) Saccardo's umber 

 172k(0-Y) 



Clayey sand (U.S.B.S. class= 

 clay); small sheUsof foramini- 

 fera; slightly coherent, crum- 

 bly 



No material available as entire 

 sample was used in mechanical 

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



Sample 10. Contains over 5 percent organic matter, nearly 2 percent Mn02, and relatively high Zr02. 

 Constituent particles of sand size include abundant dark grayish-green elongated ellipsoidal aggregates 

 about 0.3 mm in diameter, probably coprolitic pellets (see Murray and Philippi, 1908, p. 103, pi. XK, and 

 Moore, 1933, p. 24); together with a few broken pelagic and bottom foraminifera, echinoid spines, abun- 

 dant radiolaria, sponge spicules, very common manganese grains, brown mica (-2E large), quartz, green- 

 brown hornblende, augite, epidote, plagioclase feldspar, basic volcanic glass, and small rhombohedral 

 calcite crystals. 



Sample 11. Consists principally of angular fragments of altered volcanic material and iron concretions 

 greater than 0.5 and less than 8 mm in diameter, partly encrusted with worm tubes; together with a few 

 pelagic foraminifera, sponge spicules, wood fibers, but no mud. 



Sample 12. Contains abundant fragments of radiolarian skeletons, diatom frustules, and sponge spicules 

 in addition to foraminifera, but only small amounts of clay minerals. 



