272 ROCK-FRAGMENTS FROM THE SOUTH OF SCOTLAND. 
in places into a fiesh-colour or pink tint. The latter is most com- 
monly met with near the edge of the mass, and may be well seen 
along the south and west slopes of Cairnsmore Hill and up the 
valley of the Palnure Burn. The general texture of the Cairnsmore 
mass is extremely coarse; ...... by far the coarsest-grained 
examples are exposed along the top of Cairnsmore Hill. Here 
masses of granite may be seen with crystals of quartz and felspar 
upwards of two inches in length, while the granite consists for 
the most part of quartz, orthoclase and plagioclase felspar, black and 
white mica, with occasional hornblende; its lithological cha- 
racter varies, owing to the disappearance of one or more of the 
ordinary constituents. ...... The felspar is always the chief 
constituent, consisting for the most part of orthoclase, but nume- 
rous striated faces are also met with.” 
I have a specimen of coarse granite from the Low-level Boulder- 
clay, Great Crosby, containing a crystal of felspar 12 inch long. 
This coarse variety is generally found in a more crumbly condition 
than the finer-grained granites. 
It is only necessary, in conclusion, for me to point out that these 
further identifications, which go far to complete the series of Low- 
level Boulder-clay rocks, are a further confirmation of the views ex- 
pressed by me “ that all the stones (of the north-west of England 
Drift) are confined to the basin of the Irish Sea and the river-basins 
flowing into it, excepting some stray stones that may have come 
from the Highlands of Scotland” *. . 
Discussion. 
Dr. Hicxs remarked that similar evidence to that obtained on the 
north-west coast was furnished by the Vale of Clwyd. At St. 
Asaph the granites and other rocks in the Boulder-clay were to a 
great extent derived from a distant source, evidently somewhere 
to the north, only a few from the neighbourhood; but further 
south the boulders were mainly from the Welsh area. 
“The Drift-beds of the North-West of England,” Quart. Journ. Geol. Soe. 
vol. xxxix. p. 120. 
