Kinahan — On Granite and Metamorphic Rocks. 203 



worked up with limestone; but it is now much weathered. In 

 Ballymoon Castle, about two miles to the east of that town, it was 

 extensively used. This latter building is very interesting and 

 peculiar. It is about 200 feet square; the walls being about 20 

 feet high, built in range- courses. Most of the stones selected for 

 outside work have on the outer face a film of quartz, which has kept 

 them until now, as sound as when first used, while any without the 

 film are much disintegrated on the surface. The fine portions of 

 the stone were worked with remarkable smoothness, and used for 

 the splays of openings. Its good qualities for inside work are dis- 

 played in the interior of the building, protected from the weather, 

 where they are still quite perfect, while exposed surfaces have 

 weathered away to the depth of about an inch. Wilkinson observes 

 that " the weathering has been most even, showing the equality in 

 the texture of the stone." 



[In the veins or courses of granite proceeding from the main intrusion mass, it is 

 not uncommon to find the granite adjoining the joint surfaces, which are more or less 

 parallel to the walls of the courses, coated with a film of quartz. We may here note 

 that, as mentioned below, in the Co. Wexford, in some of the courses there are ribs of 

 veined quartzyte ; the vein or '' grain" (to use the term applied to the similar struc- 

 ture in the granite) being parallel to the walls of the course. In these quartzytes (if 

 they may be so called) the perpendicular "grain" is regular; but the horizontal 

 "grain" is not so.] 



Schists. 



Schists occur in a small tract in the S.W. of the county, in the 

 neighbourhoods of Newtownbarry and Clonegal. They are used for 

 walling purposes. 



KILE ENN Y. 



Granites. 



This rock occurs, as outlying exposures, S.W. and S. of 

 Inistioge, in the parish of Jerpointchurch, and to the north- 

 west of Tullagher, also in four small patches eastward of 

 that town, south of Grraiguenanianagh, in Brandon, and that 

 neighbourhood, where it is the S.W. termination of the 

 Leinster range ; and adjoining the Co. Carlow, between Graigue- 

 namanagh and Goresbridge. It is described by Jukes as 



R 2 



