THE 
GEOLOGICAL MAGAZINE. 
NEW SERIES” "DECADE Ws MV OIE. =Wilz 
No. III.— MARCH, 1910. 
(Gus We MMINAIls) yaad Ce Op Ea snfSs 
sae 
I.— Moran Devosrrs on tHE Coast av Ever, Morsraan. Parr II. 
By the Rey. R. AsHineron Butuen, B.A.Lond., F.L.S., F.G.S.;. ete. 
(PLATES IX AND X.) 
§ 1. Description of microscopic sections of pebbles forming the Raised Beach 
at Ktel. 
§ 2. Description of the photographs illustrating facts contained in Part I of this 
paper. NEED 
fW\HIS brief article is necessitated by the impossibility of procuring 
photographs and rock sections in time for incorporation in my 
former paper in the January number of the GerotoercaL Magazine, 
pp. 6-15. ‘ era 
§ 1. The rocks (i) of the Raised Beach at Htel and (ii) of the 
local granulite (in the French sense of the word) have been submitted 
to Mr. Russell F. Gwinnell, B.Sc., of the Royal College of Science, 
South Kensington, and after having had speciaily thin sections of them 
prepared, he reports as follows :— 
Perrograrnic Descrietion or Rocks From Ler, Brerrany, 
COLLECTED BY THE Rey. R. AsHineton BULLEN. . 
(Puare X, Fires. 1-5.) 
These rocks are all quartzites, varying slightly as to accessory 
constituents, and differing from one another more as to the degree 
in which the superinduced or metamorphic structures are exhibited. 
Textural differences also slightly accentuate the variation in appearance. 
One is reminded of the schistose grits or quartz-schists of the Dalradian 
Series of the South-West Highlands of Scotland, but still more forcibly 
of the Cambrian quartzites of the North-West Highland complex. 
Pl. X, Fig. 1, is a very fine-grained rock, with a foliated structure 
which, though quite well marked under polarized lght, is not apparent 
in ordinary light. It consists mainly of minute elongated granules of 
quartz, forming a fine mosaic of interlocking individuals. ‘Undulatory 
extinction indicates mechanical strain. The rock is. intersected by 
numerous veins running in many different directions, and consisting of 
comparatively coarse crystals of quartz, full of minute inclusions and 
secondary in origin. Many minute rounded grains of an opaque black 
material are distributed throughout the rock, and, by their local 
abundance, render it opaque in patches. This material suggests 
carbonaceous matter, but it is impossible to definitely identify 1t under 
the microscope. Occasional small brownish patches of indefinite 
characters suggest a coloured ‘mica or micaceous: hematite. - 
DECADE V.—VOL. VII.—NO. III. a 
