OP THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 661 



Minerals 50 per cent., m. di. 0'07 mm., angular and sub-angular: — Chiefly quartz, 

 some clear but mostly clouded with grey, green, and black particles. A very little 

 hornblende, mica, and (?) zircon. 



Fine washings 45 per cent. : — Fine mineral particles and diatoms. 



24c. Station 325 ; Scotia Bay, S. Orkneys, near Scotia's anchorage ; January 2, 

 1904; depth 5 to 10 fathoms. 



Muddy Sand. — Similar to No. 24a, but the grains are not so regular in size, m. di. 

 0"09 mm., largest about 0"15 mm., angular and sub-angular; the larger grains (over 

 O'l mm.) rounded and distinctly water- worn : — Composition of grains like those of 

 No. 24a. Diatoms abundant, littoral and ice forms. See p. 676 for Dr Gran's report 

 on the diatoms. 



25a. Station 334; November 27, 1903; 14 hours; about 1|- miles off" Coronation 

 Island, S. Orkneys; depth 41|- fathoms. 



Sand. — A dark greenish- grey slightly muddy fine sand. Very finely gritty to the 

 touch. Very little cohesion. One or two pebbles up to ^ inch in diameter of a 

 schistose quartz and hornblende rock apparently, m. di. of mineral particles 0*15 mm., 

 sub-angular, rounded, and angular. Quartz clear and clouded with dark inclusions. 

 Hakes of muscovite and biotite, especially the former, chlorite also fairly abundant, 

 hornblende, a little felspar, some calcite. A few diatoms and sponge spicules. The 

 diatoms include both pelagic and littoral forms. See p. 676 for Dr Gran's report on 

 the diatoms. 



256. Station 335 ; November 27, 1903 ; 16 hours; oif Conception Point, Coronation 

 Island, S. Orkneys ; depth 90 fathoms. 



Sand. — A very small quantity similar in its general characters to No. 25a, and 

 containing several small quartz pebbles. Composed chiefly of quartz, hornblende, 

 chlorite, and a little biotite. 



26a. Station 337a; November 28, 1903; 9 to 11.15 hours; lat. 59° 43' S., long. 

 48° 10' W. ; depth 2110 fathoms. 



Glacial Sandy Mud bordering on Diatom Ooze. — A brownish-grey mud with 

 numerous dark specks of mineral particles. Slight greasy clayey feel to the finger, 

 with numerous fine gritty particles. Very easily rubbed down in water. 



CaCOs 1 per cent. : — Foraminifera. 



Siliceous organisms 10 per cent. : — Chiefly diatoms, radiolaria fairly common, and 

 sponge spicules. 



Minerals 60 per cent., m. di. 0*13 mm., larger particles rounded, others sub- 

 angular and angular : — Quartz, chiefly clear, some clouded like that of the S. Orkney 

 rocks. Hornblende (very clear green and also brown), felspar (microcline, kaolinised, 



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