AND THE FORMATION OF VALLEYS. 101 



all of which are connected with more or less marked 

 features in the ground, and have a general paral- 

 lelism to one another 1st, The Slievenamuck fault, 

 bounding the hills, so named, on the N.N.W. ; this 

 crosses the slope of the hill, and in general does not 

 form a very marked feature ; 2d, The Knockfearna 

 fault, on the N.N.W. of the range of hills of which this 

 peak is the highest summit ; 3d, A fault in the valley 

 of the Shannon, that has been traced from Bunratty 

 to Silvermines, and probably extends to Koscrea ; 4th, 

 The Formoyle fault, connected with the valley in the 

 centre of Slieve Bernagh; 5th, The ScarrifT valley 

 faults ; 6th, The Cloonnagro and Corra valley fault ; 

 7th, The Lough Atorick valley fault; 8th, The 

 Derrybrien valley fault ; 9th, The Owenaglanna and 

 Boleyneendorrish valley fault; and 10th, 'The Dalys- 

 town river valley fault. 



In the valley between Dingle and Dungarvan, a 

 nearly east-and-west fault has been proved from 

 Dingle Bay to Mallow, and a branch of it probably 

 extends to Dungarvan, but the main fault from Mallow 

 goes nearly E.KE. past Mitchelstown ; this part is 

 nearly parallel to the faults just enumerated. It is a 

 downthrow to the northward, as are also Nos. 1, 2, and 

 3, while Nos. 4, 5, 6, 7, and 8 are downthrows to the 

 southward, but 9 and 10 have downward throws to 

 the northward. These ten faults are of Post-Car- 

 boniferous age, and on account of their parallelism, 



