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Mr. Weaver on the 
mostly of a pale greenish colour, or bluish grey, or yellowish arid 
smoke grey. Some of these varieties are slightly vesicular, the 
cavities being either empty, or filled with iron ochre ; and where 
felspar much predominates, they are distinguished by the white 
exterior coat, so characteristic of that rock. 
To the eastward of Glenteigue hill, clay slate re-appears in many 
places on the coast, for a distance of about two miles, ranging 
north-east and south-west, and dipping at a high angle to the south- 
east. It is visible also inland to the north of the mouth of the 
Ovoca. 
§ 70. It may be remarked here that in following the line of 
the two Avons, the Daragh and the Ovoca, from the granite chain 
on the west to the sea on the east, we perceive the slaty rocks gra- 
dually acquiring a higher angle of elevation. In the glens, the 
angle of apposition is from 20° to 25°, in the meridian of Crone- 
bane the angle of elevation is 65°, and nearer to the coast it varies 
from 70° to 80°. On the western side of the mountains, this order 
is in general inverted, the highest angle being in the vicinity of 
granite, and the lowest most remote from it; with this additional 
distinction, that the dip of the slaty rocks is commonly opposed to 
that of the granite declivity on the western side, while on the 
eastern their position is more conformable to the declivity. 
§ 71. Arklow rocks are situated upon the coast one mile and 
a half to the south of the mouth of the Ovoca : and their 
connexion with the interior of the country cannot be imme- 
diately traced, the surface being occupied by a considerable depth 
of valuable soil. The examination of these rocks is not without 
interest. The northern foot of the greater rock exhibits, on the 
strand, large ill defined columns of greenstone, with four, five, or 
six sides inclined at an angle of 25° to the south-west, in which 
