206 
of tourmaline, which varies from black and opaque, through 
various shades of brown, green, and blue. A good deal of 
opaque leucoxene (?) is present and some zircon. 
xxx Wield Raver, near che mouth. 
Macroscopic chamacte,rs.— А moderately 
fine, pinkish groundmass, in which quartz and felspar can 
be recognised, through which are scattered numerous larger 
fragments, up to a quarter of an inch diameter, of quartz, 
pink and brown felspar, and red jasper. 
Moi 61040 suenos presenta Chia r avert eimis.—TextüteN! fairly 
fine. Grains are very angular, both large and small ones. 
Felspar is almost as abundant as quartz, and of the felspars 
microcline is much the most common. Quartz fragments 
almost all exhibit strain. The cementing material is almost 
exclusively calcitic, and shows a very strong tendency to- 
wards fibrous structure. A little sericitic material is also 
present and very little chlorite and leucoxene. (Plate xxxiv., 
fig. 2.) 
xxl тера oh ft Ve fr, small overfold, near Hal- 
lett’s Cove. 
Macroscopic, characters —Rather finer in 
grain than xxx., with no strikingly large fragments. Colour 
more greyish than pink. Intensely hard and tough. 
Microscopic characters.—Almost exactly 
similar to those of xxx. The cementing material here 1s 
more dolomitic, with a very strong tendency to idiomorphism. 
In many instances the carbonate forms spherical radial aggre- 
gates, with or without a quartz grain as a nucleus. There is 
a fair amount of magnetite and some rutile. 
xxxi. Wilson, on the western slopes of the Black 
Jack Range. 
Quite a number of bands of quartzite occur in this lo- 
cality, interbedded with purple slates. 
Macroseopic characters. Very white, hard 
quartzites of fine grain, in which no mineral other than 
quartz can be recognised. Fracture is granular. 
Microscopic characters —Fine-graimed rock, 
essentially a mosaic of quartz. The grains are mostly clear, 
except around the edges of originally rounded grains, where 
a line of dusty inclusions occurs. Strain structures are 
only slight. A very small amount of orthoclase occurs in 
rounded grains. A feature of the rock is the comparative 
abundance of zircon, in crystals and grains, which, though 
somewhat abraded, have suffered very little during trans- 
port. 
