206 



Scientific Proceedings, Royal Dublin Society. 



Counties. 



Localities. 



Eemarks. 



Wicklow. 



35 Castlemacadam. 



35 

 35 

 35 

 35 

 35 

 40 

 40 

 39 



Ballymurtagh. 



Tigroney. 



Cronebane. 



Connary. 



Kilmacoo. 



Ballycoog. 



Ballinasilloge. 



Wicklow and 

 Kildare. 



Greystones. 



Bray Head. 



Liffey and Slaney 

 Valleys. 



Ovoca — Diluvium. — In the gravel of 

 the Ovoca river ; south of the Bail- 

 way Station. 



Ovoca — Ordovician. — In the gossan and 

 . gossan lodes of the mines on the 

 Ovoca mineral channel gold has been 

 detected ; also in places in the regular 

 ores of the lodes. The gossan lode 

 of East Cronebane {Magpie Mine) 

 seems to have been richest. In 

 places, the Kilmacooite, or "Blue- 

 stone," of the Magpie and Kilmacoo 

 are also auriferous. 



Greystones — Glacial drift. — In the 

 washings of the sea-cliffs to the 

 northward of the village ; associated 

 with black magnetic sand. 



Cambrian. — Particles in a small 

 quartz vein, discovered by Francis 

 Codd. 



Diluvium. — According to the Annals, 

 gold ' ' placers" were worked in the val- 

 ley of the Liffey, and probably also in 

 the valleys of the head waters of the 

 Slaney. The river systems of the 

 Slaney and Liffey have changed from 

 what they were originally ; as at one 

 time the Liffey occupied the valley 

 from Ballymore-Eustace to Baltin- 

 glass, and joined there into the Slaney 

 valley. This change cannot have been 

 at a very distant period. The Slaney 

 also at one time seems not to have 

 gone through the Granyte range ; but 

 at Tulla to have gone south-west- 

 ward. This, however, was a much 

 earlier change, as the river was^ 



.. banked into its present course by the 

 " Esker sea gravel." The ancient 

 workings are supposed to have been 

 somewhere near Ballymore-Eustace. 

 Places that' gold might be looked 

 for are : in Glenimale and the other 

 head valleys of the Slaney; and in 

 the ancient river course of the Liffey 

 between Ballymore-Eustace and 

 Baltimore. 



