KiLiiOE — Silurian and Metamorphic Rochs. 



147 



well-defined hollow, partly filled by the waters of Cleggan Bay, and 

 partly by Ballynakill Lough. The limestone crosses Barnabeg Bay, 

 where it is seen to be identical with that forming bands, or one ba id 

 repeated, which underlies the quartzite of Bengooria (1460) and 

 Knockbrack (1460), the western spur of the Twelve Pins group. 

 Following the limestone bands with their associated mica-schists 

 north-westward, they are seen to pass beneath the important outlier of 

 quartzite which rests in a synclinal hollow north of the large inlet, 

 Ballynakill Harbour ; and the mica-schist reappears on its north side. 

 Passing from here, near Einvyle, eastward toward Kylemore, we 

 travel over the same series uninterruptedly ; but south of Kylemore 

 the earth-strains seem to have been much more violent than in the 

 region last mentioned, producing overfolding on a great scale with 

 the inversion already mentioned. In view of such effects, it is easy 

 to surmise that in the frequently occurring outcrops of limestone to 

 be seen on the ground eastward of Kylemore Lough one sees but 

 repetitions of a few bands, possibly only one or two bands, by minor 

 puckerings of the strata, as represented in section thus : — 



Fig. 10. — Section across Knockbrack (1460) and Kylemore Lough (92) showing 

 micaceous grit {nig) penetrated by epidiorite (A) limestone bands {h), 

 and mica-schist (m) over-riding and underlying overfolded quartzite 

 (?)• 



A similar section might be drawn near Maam, representing the 

 relations of the two great groups of strata, with a limestone and 

 schist series, near the quartzite, the present order of superposition 

 being here also inverted ; and particular attention is directed to beds 

 of pebbly grit, perhaps represented, though meagrely, north of Kyle- 

 more Lake (see section), but which are to be well seen and traced 

 through the region eastward toward Maam Bay, where they in part 

 form the ridge bounding the Glenglosh valley on the north. Thoy 

 are again met with on the north side of the bay — a branch of Lough 

 Corrib — and attain striking development about tliree miles east by 



Q2 



