26 



MARINE BOTTOM SAMPLES OF LAST CRUISE OF CARNEGIE 



Table 1. 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 



Red clay 



Globigerina ooze? 



Globigerina ooze 



<10; inspec- 

 tion 



78; total C02 



(Wet) between Brussels-brown 

 and mummy-brown 16l/2m(0-Y) 



Sandy clay; shells of foramini- 

 fera and angular mineral 

 grains; lumpy, greasy feel 



No material received 



(Moist) Saccardo's umber 



172k(0-Y) 

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



41 



80 



42 81 



43 82 



24 



26 



28 



12 39 8 

 117 22 W 

 3515 m 



13 03S 



121 12 W 



2953 m 



14 52 S 



126 07 W 



3631 m 



Ferruginous glo- 

 bigerina ooze 



Globigerina ooze 



Globigerina ooze 



90; acid 

 soluble CaO 



93; total CO2 



89; total CO2 



(Moist) between Saccardo's um- 

 ber and tawny-olive 172j(0-Y) 



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

 shells of foraminifera; slightly 

 coherent, granular, crumbly 



(Dry) pale pinkish-cinnamon 



152f(Y-0) 

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



shells of foraminifera; slightly 



coherent, granular 



Sample used up in mechanical 

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



44 



83 Mar. 3 



17 00S 



129 45 W 



3966 m 



Globigerina ooze 



75; acid (Dry) avellaneous 173b(0-Y); 



soluble CaO (moist) mummy -brownl7lm(0-Y) 

 and total C02 (wet) between Saccardo's umber 

 and snuff-brown 162k(YO-OY) 

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

 loam); shells of foraminifera; 

 when moist, moderately coher- 

 ent, very slightly plastic, 

 greasy feel; when dry, moder- 

 ately coherent, pulverulent, 

 granular 



Sample 38. Too small for detailed examination, but appears to be quite similar to sample 30, except that 

 there is a higher percentage of fragments of tests of pelagic foraminifera, and twinned crystals of phillip- 

 site (?) are present. 



Sample 39. No sample was received in Washington. According to Seiwell, this sample consisted entirely 

 of broken and intact skeletons of foraminifera together with some "yellowish brown amorphous matter." 



Sample 40. Sand grades consist almost entirely of pelagic foraminifera, about 20 per cent of which are 

 broken, together with rare benthonic foraminifera and manganese grains. Silt fractions contain numer- 

 ous small manganese grains, besides finely divided calcium carbonate and siliceous remains. Bright 

 orange color of colloidal material indicates that it is high in iron. 



Sample 41. Similar to no. 40, except that very few of pelagic foraminifera are broken, and small manga- 

 nese grains are much less common. In both these samples the foraminifera are grayish-tan in color. 

 In addition to pelagic foraminifera, traces of benthonic and arenaceous foraminifera, echinoid spines, 

 ostracods, fish teeth, sponge spicules, and radiolaria are present in sand grades. 



Sample 42. Consists almost entirely of pelagic foraminifera, very few of which are broken. Many of these 

 are yellowish-brown in color and some exhibit slight recrystallization. Many very small tests are pres- 

 ent. A few siliceous remains, and twins of phillipslte also occur. 



