on cruise VII of the Carnegie in the Pacific --Continued 



Sampler 

 and con- 

 tainer used 



Field notes 



Nearest previous samples 



Sigsbee tube; 

 vial 



Sigsbee tube; 

 vial 



Sigsbee tube; 

 12-oz. bottle 



Bottom sample brown mud in 

 Sigsbee tube no. 2 with 

 detachable weight 



Hard bottom; small fragments 

 of sample; two dents in Sigsbee 

 tube no. 2; no water in tube 



Used Sigsbee tube no. 2, detach- 

 able weight. Good sample of 

 cream-colored clay-ooze and 

 volcanic sand 



Nero 1036. Flint (1905, p. 24); 18° 08.5' N, 144° 04.7' 

 E. 2155 fathoms. Volcanic mud; CaCOs not de- 

 termined. Light brown, finely granular, nonad- 

 hesive mud, containing few foraminifera and rela- 

 tively little "amorphous" matter. Remainder con- 

 sists of fine angular mineral fragments 



Nero 1084. Flint (1905, p. 24); 22° 45.5' N, 143° 40.7' 

 W. 2313 fathoms. Volcanic mud; CaCOs "°' deter- 

 mined. Light brownish-gray, granular. Occasional 

 foraminifera, many radiolaria and much volcanic 

 glass, some grains brown and porous, others fila- 

 mentous, remainder sharp, angular, transparent 

 fragments 



Nero 1126. Flint (1905, p. 25); 26° 12.7' N, 143° 08' 

 E. 972 fathoms. Volcanic mud; CaCOs not deter- 

 mined. Mostly volcanic sand with a few pelagic 

 and benthonic foraminifera 



Sigsbee tube; 

 12-oz. bottle 



Good conditions 



None 



Sigsbee tube; 

 vial 



Sigsbee-Ross 

 snapper; 12- 

 oz. bottle 



Tube had small fragment clay 

 and black mud. Hard bottom 



Good sample 



Nero 1207. Flint (1905, p. 25); 33° 22' N, 140° 35.7' 

 E. 635 fathoms. Blue mud; CaCOs not determined. 

 Few small foraminifera and radiolaria; coarse 

 mineral fragments, many of them black; many 

 fragments coated with palagonite 



Challenger 237 (p. 112); 34° 37' N; 140° 32' E. 1875 

 fathoms. Blue mud; CaCOs = 4.45 percent; 1.5 per 

 cent pelagic, 1 per cent benthonic foraminifera, 2 

 per cent otoliths and vertebrae of fish, cephalopod 

 beaks, pteropod and heteropod fragments, echinoid 

 spines. Siliceous organisms 5 percent, remainder 

 clay and a large amount of volcanic material in- 

 cluding orthoclase and plagioclase, au<iite, horn- 

 blende, magnetite, black vesicular glass, pumice, 

 biotite, manganese 



Sigsbee-Ross 

 snapper; 12- 

 oz. bottle 



None 



clase feldspar (labradorite). 



Sample 55. Very small, fine-grained sample. The small amount of siliceous organic material is made up 

 of the remains of radiolaria, diatoms, and sponge spicules. Basic volcanic glass, pumice, and fine- 

 grained material make up approximately one-half of sample. Other constituents are abundant plagioclase, 

 some quartz, green hornblende, biotite, magnetite, augite, chlorite, colorless garnet, and palagonite. 



Sample 56. Radiolaria make up about 60 per cent by volume of the sand grades of this sample; most of the 

 remainder is of basic volcanic glass (index of refraction about 1.56), containing many microlites of feld- 

 spar and augite--some of the fragments of glass are slightly altered around the borders. Other constitu- 

 ents of sand grades are arenaceous foraminifera, few pelagic foraminifera, sponge spicules, some dia- 

 toms; colorless and light green pumice, quartz, biotite, euhedral hypersthene, plagioclase feldspar (lab- 

 radorite), palagonite (?), hornblende, monoclinic feldspar, and augite. Magnetite is not common. The 

 silt and clay fractions consist largely of plagioclase, monoclinic feldspar, volcanic glass, and the other 

 minerals noted above, together with some diatoms and fragments of radiolaria. ^ clay mineral of high 

 index of refraction (about 1.56) and appreciable birefringence is present in the clay grade. 



Sample 57. Similar to sample 56, except for brown rather than gray color, greater abundance of siliceous 

 organisms, and smaller amounts of basic volcanic glass and heavy minerals. Contains one large roonded 



271 



