Kinahan — On Irish Arenaceous Rocks. 593 



associated slate being much, preferred for general purposes ; 

 although not capable of being used in dressed work. Fair flags 

 have been raised in a few places, as in Dartree, which lies north 

 and north-west of Clones. 



To the south of the county, in the neighbourhood of Carrick- 

 macross, is a small tract of Carboniferous rocks, principally lime- 

 stone : this is overlaid by Coal-measures, and the latter, uncon- 

 formably, by Triassic rock ; the principal portions, however, of the 

 outlier of the later rocks are situated in the neighbouring counties 

 of Cavan and Meath. 



To the north of the county there is a second area of Carbo- 

 niferous limestone. And margining this to the southward, and 

 lying on the Ordovician, is a narrow tract of Lower Carboniferous 

 Sandstone, on which Clones and Monaghan are situated ; while 

 further northward are the rocks of the " Fermanagh Series," or 

 Lower Coal-measures of the Fermanagh type [Fermanagh, p. 560). 



In the Fermanagh portion of the Slieve-Beagh district there 

 are different quarries of former and present note ; but eastward in 

 this county there are none, although the " Fermanagh Sandstones" 

 extend into it ; also in places on the flanks of Carnmore superior 

 stone have been procured. In Castleblayney, Monaghan, and 

 Clones, most of the stones used for cut-stone purposes were brought 

 from the quarries in the Fermanagh portion of Carnmore or quar- 

 ries in the Lisnaskea district, or from the Clogher district (Lotcer 

 Carboniferous Sandstone), Co. Tyrone. In the south of the county, 

 at Carrickmacross and its neighbourhood, the sandstones have been 

 brought from Carriclcleek, Co. Meath. 



Carnmore. — Yellowish-reddish. Chiefly quartz grains ; fer- 

 riferous spots ; somewhat friable ; works freely. On the summit 

 of the mountain there was an extensive quarry for millstones ; 

 which, after being wrought in the quarry, were let roll down 

 the mountain, and conveyed to Scotstown, where there was a 

 depot. On the northern side of the hill there is a soft whitish 

 freestone, and on the southern a hard reddish grit. 



Knochiatally . — A good freestone, formerly extensively quar- 

 ried for use in the neighbourhood. 



Emyvale. Southward of. — Fermanagh Sandstone (?), used in 

 Monaghan. 



In the parish of Donagh, to the north of Monaghan, excellent 



