175 
Geological Relations of the East of Ireland. 
the right bank of the river, in approaching Aughrim, two or three 
others, of a similar description, may also be observed. 
§ 66. In descending the right bank of the Ovoca, we perceive 
between Newbridge and Knocknamohil brow, in the line of the 
mail coach road, two beds similar to those in the banks of the 
Daragh, one four feet, the other one foot wide, separated by an 
interval of clay slate five feet in width* At Knocknamohil brow 
is a bed of greenstone five fathoms wide, much of which is of a 
large crystalline structure. From the hill above this point, the eye 
commands the beauties of the banks of the Ovoca with the mag- 
nificent woody brows of Bally Arthur, Shelton, and Kilcarrah. 
Below Kilcarrah bridge, we encounter several other beds analogous 
to those already noticed. Their general characters are those of 
felspar, granular and compact, dotted or coloured in spots by horn- 
blende, which decaying near the surface, the stone appears as if 
composed of a mixture of felspar and iron ochre. One bed about 
five fathoms wide may be observed a little below the confluence of 
the Ovoca and Daragh, and three others in approaching Kilcarrah 
castle. Two of these are each three fathoms wide, separated by an 
interval of clay slate thirty fathoms thick. The latter of these is 
partly intermingled with slate, and traversed by contemporaneous 
veins of quartz. About ten fathoms lower down is the third bed, 
eight feet thick. The clay slate in this quarter is in some places 
intersected by contemporaneous veins of quartz, nearly horizontal, 
the limits of which may be followed by the eye; and I have 
observed veins of the same description in the clay slate near Rath- 
drum, and in other quarters. 
§ 67. In the line of the Ovoca we may remark, that although 
the general dip of the clay slate is to the south-east, it sometimes 
appears to dip to the north-west, a phenomenon which I conceive 
