Kinahan — On Irish Arenaceous Rocks. 585 



Carboniferous. — These rocks, although of small extent, are 

 locally in fair request, notwithstanding that excellent limestone 

 can be easily obtained in the neighbouring counties ; and, as men- 

 tioned in the previous Paper, the latter class of stone for some 

 years has been principally sought after for cut-stone purposes. 



In the Granard district, in general, the stones are whitish-grey 

 or bluish, splintery, and hard to work, and are seldom used, 

 except for walls. There is, however, in some beds, a better class 

 of stone, of a yellowish colour, that works freely. 



Battinacroiv. Two miles from Granard.— Yellowish ; quartz 

 grains, little cement, micaceous ; spotted with iron and calcareous 

 matter. 



Dalystown. Four miles from Granard.— Steel-grey ; hard, 

 silicious ; spotted with calcareous matter. 



Ballinamiick. Twelve miles from Granard. — Yellowish ; 

 coarsely granular, white grains in an argillo- silicious cement. 

 Here are also to be obtained hard flags of good sizes, that have 

 been used in Longford. 



Ardagh — Greyish- white ; open and porous, white grains in a 

 silicio-calcareous cement ; ferruginous spots ; used in Granard. 



Qlack. Near Longford.— Over a large tract of country there is 

 a coarse conglomerate. On this conglomerate, in the quarries near 

 Longford, there are sandstones. The latter are yellowish, but 

 becoming white on exposure ; coarse, white quartz grains, with 

 3^ellowish argillo- silicious cement ; can be raised in blocks, 6 feet 

 square, and 4 feet thick ; used for the buildings in the town, and 

 also wrought into millstones for oat bruising. 



Edgeivorthstown.—In the Calpy limestone are good flags, very 

 similar in appearance to the Oarlow flags. 



Sands and Gravels.— Pit sands procured near Granard, Bally- 

 mahon, and Newcastle ; elsewhere scarce. 



LOTJTH. 



The major portion of the county is occupied by Ordoviciano. 

 To the north, at Carlingford, and on the south-east flanks of Slieve- 

 Foye, are small thicknesses of Carboniferous Sandstone, and also to 

 the westward, near Ardee. 



In the Okdovicians there does not appear to be any quarry of 



