1911-12.] 
277 
Report on Rock Specimens. 
Carboniferous rocks are represented by seven specimens of dark 
encrinital limestone like the Carboniferous Limestone of Ireland, seven 
small beautifully glaciated specimens of parrot coal or dark carbonaceous 
shale. Twelve fragments of dark micaceous sandstone, resembling some of 
the fossiliferous sandstones from Station 95, may belong to this formation. 
A few small flakes of dark shale, probably a fragment of a larger piece, 
also occur. One of these contains a fragment of what appears to be a 
cycadaceous leaf, and is probably derived from jurassic rocks. 
The cretaceous formation is represented by two specimens of decomposing 
splintery rock like a hardened greensand, over forty fragments of chalk and 
hard grey limestone, thirteen of which show grains of glauconite. Most of 
the above are glaciated. Some of the hard limestone may be of Cainozoic 
age, like that recorded by Messrs Cole and Crooke * from the dredgings 
off the coast of Ireland, close to Station 95 of the Michael Sars. 
Metamorphic Rocks . — The collection contains seventeen small specimens 
of granulitic muscovite-biotite gneiss, like that from Station 95. Of these 
thirteen are subangular and ice-moulded, and four well striated. There 
are three pieces of hornblende-gneiss, one subangular and two glaciated. 
These latter are like some of the Lewisian gneisses of the north-west of 
Scotland. One small fragment of chlorite schist is a sheared epidiorite, 
like those from Station 95. 
Igneous Rocks . — The plutonic rocks are represented by six fragments 
of granite, like those from Station 95, eleven of diorite and gabbro, and one 
of quartz-syenite, all glaciated ; dyke rocks by fourteen fragments of 
dolerite ; and volcanic rocks by thirteen specimens of slaggy basalt. 
The above assemblage of rock specimens, most of which are glaciated, 
is almost identical with that from Station 95, leading: to the conclusion that 
they are from the same sources and distributed by the same agencies. 
The conditions under which they occur on the sea-floor seem to be 
somewhat different from those occurring at Station 95, as most of the 
specimens show a more pronounced coating of manganese oxide. One 
specimen of limestone has a comparatively large manganese concretion 
attached to its exposed side. 
The investigation in the “ Challenger ” office shows that the deposit at 
this Station is globigerina ooze, of which the sounding-tube brought up a 
roll about 5 inches long. The ooze consists of 66T1 per cent, of calcium 
carbonate and a residue of 33'89 per cent, of clay and mineral matter. The 
smallness of the rock fragments may be due in part to causes similar to 
those suggested for the nearly uniform size of the stones from Station 95. 
* Op. cit ., p. 23. 
