■38 



MK. P. E. C. EEED ON THE LOWER PAL^.OZOIC [NoV. 1899, 



dipping mostly at high angles westward, and pierced by numerous 

 small intrusive yeins and by several large sheets of felsite [693] 

 [690] [692] [243] [239], which are frequently columnar [693] [239]. 



At the eastern end of this long strand the rocks in Foilnaneena 

 Cove are much crushed and shattered for a distance of nearly 

 50 yards, and constitute a huge mass of vein-stuff composed of 

 fragments of felsites, ' greenstones,' the above-mentioned slates and 

 mudstones, vein-quartz, etc., all impregnated with copper-ore. 



Below the ruined engine-house on the edge of the cliffs east of 

 the cove at Knockmahon, in which is the wooden jetty, occurs a 

 mass of fossiliferous limestones (fig. 15) similar to those near Tramore, 



Pig. 15. — Section at the base of the cliff below the engine-house, 

 Knockmahon. 





A = Intrusive felsite [687] crushed along the fault-plane F. 



B=Intrusive greyish felsite [686] crushed along the fault-plane F. 



C=Beclded impure limestones traversed by several zones of crushing, C 



D = Greenish felsite [688] intrusive in H. 



E = Intrusive vein of felsite [689] penetrating D and H. 



H = Pale purplish, cleaved and disturbed slates. FF=Faults. 



let in by faults between the slates and igneous rocks [688] 

 [686]. The bedding of the limestones is almost horizontal. 



The following fossils have been collected or recorded from this 

 locality : — 



S=Si 



s. a. 



irv( 



jy Collection. G = Sir E. Griffith's Collection, M=:my collection. 



M. 



Mo7iticuli'pora fetropolitana. 



G. Orthis (?) prodtictoides. 



G-. 



Stenopora fibrosa (1) . 



G. simplex. 



M. 



Asaphus sp. 



G. elegantula. 



M. 



Fhacops Jamesii. 



S, M. Orthisina (?) crispa. 



G. 



truncato-caudatus. 



G. Porambonites intercedens 



S. 



Calymene hrevicapitata. 



var. filosa. 



s. 



Trinucleus sp. 



G, Pledambonites sericea. 



G. 



Orthis biforata. 



G. Hafivesquina expansa. 



G. 



calligramma. 



G. Murckisonia sp. (?). 



(/) Ballydouane Bay. 



At the western end of Ballydouane Bay is a mass of a peculiar 

 banded calcareous rock [184 w], called by Kinahan ' ophiolite,' and 

 having very much the appearance of serpentine. This mass is 

 bounded on the east by a fault which brings the Old Bed Sandstone 



