654 BR J. H. HARVEY PIRIE ON DEEP-SEA DEPOSITS 



particles. No odour. When dried is hard and polishes when rubbed on the finger-nail, 

 readil}^ adheres to the tongue, breaks down very slowly in water. 



CaCO^,^ a trace : — One small fragment of a molluscan shell. 



Siliceous organisms, a trace : — Kadiolaria and a few sponge spicules. 



Minerals 5 per cent. A few fairly large fragments, m. di. 0'16 mm. rounded 

 and angular, the larger fragments being well rounded : — Quartz, felspar (plagioclase, 

 orthoclase, and microcline), green hornblende, hypersthene, augite, tourmaline, volcanic 

 glass, pumice, a few grains coated with manganese. 



Fine tvashings 95 per cent : — Amorphous matter and small undeterminable 

 mineral particles. 



9. Station 246; February 20, 1903; lat. 69° 40' S., long. 21° 50' W. ; depth 

 2558 fathoms. 



Glacial Clay. — Only a small quantity off the sounding-lead. In appearance 

 similar to the upper layers of No. 8. When dry, of a darker shade, and is a hard clay. 

 Breaks down rather more readily in water than No. 8 does, and is more gritty to 

 the touch. 



CaCO^:—Wil. 



Siliceous organisms, a trace : — Sponge spicules. 



Minerals 10 per cent., m. di. 0'07 mm. : — A very few larger fragments, some of 

 which are well rounded, and one or two appear to be striated. Quartz, plagioclase, 

 volcanic glass, hornblende, biotite, serpentine, and (?) tourmaline. 



Fine washings 90 per cent. : — Amorphous matter and small mineral particles. 

 The number of the latter under 0"02 mm. is large. 



10. Station 273; February 28, 1903; lat. 69° 22' S., long. 26" 36' W. ; depth 

 2587 fathoms. 



Glacial Clay. — Obtained in considerable quantity from Admiralty sounding-tube. 

 Drab grey in colour, light grey when dry. Clayey, but not quite so tough as No. 8. 

 Soapy feeling between the fingers, but with a considerable number of gritty particles. 



CaCO^ : — A trace. 



Siliceous organisms, a trace : — Radiolaria. 



Minerals 10 per cent., m. di. 0*08 mm. : — Quartz, most abundant; one grain, about 

 0*35 mm. in diameter, shows several striae; all the larger grains are rounded or sub- 

 angular. Green hornblende, felspar, both monoclinic and triclinic, magnetite, garnet. 

 A very little manganese coating on some of the grains. 



Fine washings 90 per cent. : — Composed largely of mineral particles under 0'05 mm. 

 in diameter, and mostly much less. It is estimated that if particles down to 

 0'005 mm. were to be included under "Minerals," it would bring that heading up to 

 about 60 per cent., and even then all the remainder would not be amorphous clayey 

 matter, but would still contain very minute mineral particles. 



