163 
Geological Relations of the East of Ireland. 
a great bed of greenstone and greenstone slate : and near the sum- 
mit the mica slate is remarkably contorted, dipping 30°, while in 
the eastern side of the hill the dip is 65°. 
§ 49. In descending from the top of Kilranela hill to the south- 
west we cross the outcrops of the beds, and proceeding thence to 
Ballylug glen, at the foot of Baltinglass hill, we observe in our 
course a remarkable succession. 
Mica slate continues to occupy Kilranela hill for some distance 
down the south-western declivity, when we encounter granite, 
under which mica slate protrudes in several places, succeeded on 
the surface by great blocks of granite and hornblende lying con- 
fusedly, with all their angles sharp and well defined. To the west 
of the plantation mica slate re-appears, which is partly por- 
phyritic like that of Brisselstown, and some of it contains horn- 
blende. It is succeeded by great prominent masses of common, 
hornblende, and of greenstone, composed of compact felspar co- 
loured by hornblende, and containing the latter substance dissemi- 
nated. Beyond these rocks mica slate is again visible, and this 
is succeeded by granite, which occupies the public road toward 
Kilranela, by the side of which the two rocks come nearly in 
contact. All these beds may be traced in their course to the north- 
west and south-east, and they appear to lie in parallel order. 
Ballylug glen has a direction toward the south-west. At its 
north-eastern extremity granite rocks project on both sides, but in 
descending the glen we find in alternate succession both mica slate 
and granite; these two forming even in this glen four principal 
alternations, which include several others upon a smaller scale. 
The position of the rocks is conformable, ranging 25° to 30° west 
of north and east of south. In their range the rocks appear to 
pass through the south-eastern flank of Baltinglass hill, which, 
x 2 
