REPORT ON THE DEEP-SEA DEPOSITS. 137 
RESIDUE. 
1 ........ 
Additional Observations. 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
(2 ’00 %), fragments of Sponge 
spicules and Diatoms. 
1 
(90‘00 %), m. di. 0'60 mm., 
rounded ; quartz, felspar, 
mica, hornblende, augite, 
glauconite, pumice, particles 
of crystalline and schistose 
rocks, epidote, garnet. 
(6 '87 %), a small quantity of 
amorphous matter, flocculent 
organic matter, and many 
minute mineral particles. 
The dredge brought up some sand, sandy concretions, v 
and many animals, also some pieces of carbonised 
wood. The particles of crystalline and schistose rocks 
are often black, and more or less rounded. Many of 
the mineral and rock particles are covered with chlo- 
ritic matter as well as with limonite. 
' 
- 
This deposit is the same in all respects as that described 
for Station 313, except perhaps that there is a little 
more glauconite. 
(3 00 %), Sponge spicules, 
Diatoms. 
(I'OO %), m. di. 0'08 mm., 
rounded ; quartz, felspar, 
hornblende. 
(56'88 %,) amorphous matter 
and fine particles of minerals 
and siliceous organisms. 
"With the exception of the Foraminifera and Ostracodes, 
the organisms are fragmentary; some are macro- 
scopic. 
j(2'00 %), Sponge 'spicules, 
1 Lituolidse. 
1 
1 
! 
(70'00 %), m. di. 0'15 mm., 
rounded and angular ; frag- 
ments of clastic rocks, black 
mica, quartz, felspar, augite, 
magnetite, glauconite, horn- 
blende. 
(13'39 %), a small quantity of 
amorphous matter, with many 
minute fragments of minerals 
and siliceous organisms. 
There was nothing in the sounding tube. The trawl line ' 
parted between the weights and the trawl while being 
hauled in. The gravel and animals obtained came up 
in the tow-net attached to the weights. Among the 
pebbles were glauconitic and phosphatic concretions. 
!(2’00 %), Radiolaria, Astrorhiza, 
imperfect casts, Diatoms. 
' 
1 
(50‘00 %), m. di. O'lO mm., 
angular and rounded; quartz, 
pumice, felspar, hornblende, 
augite, mica, magnetite, glau- 
conite. 
(15'31 %), amorphous matter, 
with many fine mineral 
particles and fragments of 
siliceous organisms. 
The sounding tube had sunk over a foot (30 cm. ) into the 
bottom, but brought up only a small quantity of the 
mud. This was of a blue colour with here and there 
some lighter coloured patches. There was no evidence 
to show that the trawl had ever touched the bottom. 
3 '00 %), Radiolaria, Sponge 
^ spicules, Astrorliizidae, Lituo- 
1 
(40 "00 %), m. di. 0'12 mm., 
rounded ; quartz, monoclinic 
and triclinic felspars, horn- 
blende, pumice, glauconite. 
(50'59 %), amorphous matter, 
fine mineral particles, and 
fragments of siliceous organ- 
isms. 
The sounding tube had sunk nearly 14 inches (35 cm.) 
into the deposit and brought up about a litre of the mud. 
This was of a blue-grey colour throughout, with the 
exception of the thin watery surface layer, which had 
a brown colour. Some of the particles of felspar are 
kaolinised while others show no alteration. 
1 2'00 %), Radiolaria, Astror- 
I hizidse, LituoHdae, a few 
Diatoms. 
(70'00 %), m. di. 0'15 mm., 
rounded; quartz, felspar, pla- 
gioclase, hornblende, augite, 
magnetite, pumice, glauco- 
nite. 
(16'11 %), amorphous matter 
and many minute mineral 
particles. 
The sounding tube brought up only a small concretion 
about 15 cm. in diameter. In the trawl there were five 
or six similar concretions and a little of the Blue Mud 
described. The concretions are phosphatic and contain 
glauconite. Many of the Foraminifera are macroscopic. 
Some of the mineral particles attain a diameter of 1 
mm. Many of the minerals, principally the felspar, 
are covered by or impregnated with a green chloritic 
matter apparently intimately united to the mineral 
which it envelops. Felspar is chiefly represented by 
plagioclase. Some quartz grains contain inclusions of 
liquid carbonic acid. 
(deep-sea deposits chall. exp. — 1890.) 18 
♦ 
I 
Sandy Point to Falkland Islands. Falkland Islands to Rio do la Plata. 
