148 



Proceedings of the Royal Irish Academy. 



No. of 

 observed Faults, Dykes, 





Locality where 



Magnetic True 



Directions. and remarkable Joints. 





observed. 



Bearing. Bearing. 



140 



Great Eurite vein, . 





Dalkey Quarries, 



26^-27° W. " 







142 



,, ,, ,, 





,, ,, 



28"-30° W. 







143 



)> J! )> 





J) 



30" W. 







193 



Great joint, 





Sutton Shore, . 



30° W. 







208 



Joint and fault, 





Howth, S. side. 



28° W. 



>49°39 



W. 



212 



))!>•■ 





,, ,, 



27°-28° W. 







400 



Fault -with dislocation and 



Donabate Coast, 



27°-28° W. 









cave, 













64 



Joiat and dyke, 





KillineT (Long Rock) 



28° 30' W. ^ 







71 



Eurite vein, . 





■KiHiuey, . 



33° W. ) 





233 



Great vertical joint. 





Hovrth, S. side, 



33°-34° W. 54° 40 

 33°-34° W. ) 



W. 



434 



" 





" • 





43 



Great open joiat, . 





Kiagsto-mi Quarry, 



38°-39° W. ) 

 37°-38° W. 59° 30' 

 38°-39° W. ) 





52 



Quartz vein, . 





Bullock Quarry, 



w. 



201 



Great joint. 





Ho-svth, S. side, 





144 



Great dyke of porph 



yry, 



Dalkey Quarries, 



44° W. 65° 20' 



w. 



203 



Great joint, . 





Howth, S. side. 



50° W. 1 _., ,, 

 47°-48° W. ) '" '^ 



w. 



449 



Well-marked fault, 





Lough Shinney Coast 



151 



Lode, 





CaiTickmines, . 



57° W.^ 





247 



Contact of quartzite 

 shales. 



and 



Ireland's Eye, . 



50°-56° W. 







343 



Fault, '. 





Malahide Coast, 



55° W. 







383 



Feldspathic lode or dyke. 



Donabate Coast, 



57°_58° W. 







410 



Fault, . 





,, ,, 



o3°-54° W. )>76'33' 



w. 



453 



Cave on open joint (old 



>j )) 



54°-55° W. 









copper level). 













526 



Large joint, . 





Woodlands, 



57°-58° W. 







539 



Main jointing. 





Salmon Leap, LeixUp, 



53° W. 







563 



" " • • 





Kimmage Quarry, 



66° W.J 





379 



Fault, - 





Malahide Coast, 



62°-63° W. 83° 50' 



w. 



39 



Great open joint, . 





"Kingsto-mi Quarry, . 



67° W. \ „„, ., 

 69°-70° W. 1 ^^ "^^ 



w. 



166 



Marked jointing, 





Red Rock, Howth, . 



254 



Contact of quartzites 



and 



Ireland's Eye, N. 



77° W. \ 







shales, 





side. 



/ 99° 50' 



w. 



356 



Great fault, . 





Malahide Coast, 



78°-80° W. } 





384 



Feldspathic lode, . 





Donabate Coast, 



80°-85° W. \ 80° 10' 



E. 



419 



Fault, . 





Rush Harbour En- 

 trance, 



75°-76° W. ] 





399 

 408 



Great fault, . 

 Fault, _. 





Donabate Coast, 



87° W. \ . 

 88° W. ( ^^" ^" 



\Y. 



547 

 550 



Main joint. 





Feltrim Quarry, 



89° W. ( 

 92° w. ; 



69° 40' 



E. 



