268 
Proceedings of the Koyal Society of Edinburgh. [Sess. 
Insoluble in Acid. 
Rock. 
'o 
<! 
o3 
O 
o> 
Composition of Coarse Residue. 
o 
'o 
m 
Per cent 
o 
‘m 
Oi 
O) 
O) 
o 
c /2 
c5 
O 
o 
Minerals. 
Max. Size 
of Grains. 
Average Size 
of Grains. 
Organisms and 
Other Ingredients. 
B 4 
Fragment of a 
large rounded 
boulder of grey- 
ish-white chalk. 
94*95 
5*04 
4*52 
•52 
Quartz, mica, 
felspar, tour- 
maline. 
*41 
*12 
Some aggregations 
of siliceous matter. 
Few spicules. 
Fragments of sili- 
cified vegetable 
matter. Many 
arenaeeous Fora- 
minifera besides 
siliceous casts. 
BlOi 
B 12f 
Not analysed. 
kl 
A rather small 
sub - angular 
fragment of 
rather soft 
white chalk. 
97*58 
2*42, 
2*16 
•26 
Quartz, felspar, ' 
muscovite, bio- 
tite, chlorite, 
garnet. (A few 
grains of glau- 
conite. ) 
A few(?) residuary 
spicular canals in 
chalcedony. One 
Radiolarian. Frag- 
ments of silicified 
vegetable matter. 
A5 
A small oblong 
rolled pebble of 
hard white 
chalk. 
98*68 
1*32 
1*06 
*26 
Quartz, felspars, 
biotite, anatase, 
zircon. Many 
minute spheres 
of pyrites. 
*30 
*12 
Two or three 
spicules. 
A6 
A small sub- 
angular rolled 
pebble, chalk 
hard and white. 
98*16 
1*81 
1*22 
*59 
Quartz, felspar, 
muscovite, chlo- 
rite. 
*32 
*11 
A few spicules. 
Fragments of 
silicified vegetable 
matter. 
Dredged by 
s.s. Gol 
'dseeker. 
Cl 
A fragment of 
greyish - white 
chalk. 
69*50 
30*50 
8*44 
22-04 
Quartz, mica. 
Sponge spicules very 
abundant. A few 
Radiolaria. 
G1 
An angular frag- 
ment of white 
ehalk, little 
rolled. 
98*50 
2*50 
1*40 
*10, 
Quartz, a few 
grains only. 
*14 
RMzammina, Ain- 
modiscus. Frag- 
ments of silicified 
vegetable matter. 
G3 
A small rolled 
pebble of hard 
white chalk. 
99*20 
*798 
*780 
*018 
Quartz, felspar, 
hornblende, 
tourmaline. 
*05 
Rhizammina, Am- 
modiscus. Frag- 
ments of silicified 
vegetable matter. 
G16 
A small rolled 
pebble of hard 
white chalk. 
98*39 
1*603 
1*542 
*061 
Quartz (three or 
four rather 
large grains, 
may have re- 
mained in hol- 
lows of the 
pebble). 
Rhizmnmina'^. Frag- 
ments of silicified 
vegetable matter. 
