O'Reilly — On Jointing in Rocks about Dublin Bay, 8^c. 299- 



106. 



107. 

 108. 



109. 



110. 

 111. 

 112. 



Dalkey Eail'way : — 



Between the two bridges, east of Sandycove Station 



on north side, vertical jointing. 

 At bridge, 100 yards west of Glenageary Church, 

 ,, ,, ,, on north side of line, 



well-marked joint, with slight dip to south. 

 East of bridge, at Glenageary Church, repeated 



jointing, slight dip to east, 



40 yards east of bridge, vertical jointing, ] 



.' N-"- 



7^-8 



°W. 



)5 



18"-2 



3^W. 



A 



23° 



W. 



KX 



39° 



E. 



JJ 



36° 



E. 



5 J 



42° 



E. 





48'^ 



W. 



Dalkey : — 



113. Entrance to old Quan-ies, Dalkey, north-west side, 



great face of rock, . . . ■ ,, 20°-22° E. 



114. ,, south-east side, great face of rock, . ,, 2°-3° E. 



115. ,, south-west side, ,, ,, ,, . . ,, 7°— 8° W. 



116. 

 117. 

 118. 

 119. 

 120. 



121. 

 122. 

 123. 

 124. 

 125. 



126. 

 127. 



128. 



129. 



130. 



131. 

 132. 

 133. 



134. 

 135. 



136. 



137. 

 138. 

 139. 

 140. 



141. 

 142. 



143. 



Dalkey Q,uarries : — 



East side of eastern quany, vertical face, 



,, ,, ,, another, vertical face, 



,, ,, ,, general direction. 



Eastern quarry, south-eastcorner,greatverticalface, 



,, ,, 20 yards from south-west comer, 



vertical joint, with quartz vein, 



,, ,, vertical cross jointing, apparentlj', 



,, ,, west side, south end, great face, . 



,, ,, ,, towards middle ,, 



,, ,, ,, at north-west end, face, 



J, ,, cross jointing, at south end, rough 



and broken, .... 



Middle lower Quarry, north-east side, vertical face, 



, , outcrop on ground, 



south-east side, great vertical 



face, .... 



south-west side, great central 



rib, under old Telegraph, . 



Eurite vein, on continuation 



of this, .... 



west side, joint near Eurite 



vein, dip east, . 

 west side, Eurite vein, dip east, 

 , , j oint more to west, ■with 



same dip, 

 ,, gTcat Eurite vein, 0™' 30 



thick, dip west, 

 ,, cross jointing, . 

 ,, great vertical face, 

 north-westpoint, Eurite vein, 

 Upper Quarry, great Eurite vein, 0™-25 thick, imder 

 old Telegraph, .... 

 another in same place, . 

 great Eurite vein, 2"'-o0 thick, dip- 

 ping east, running approximately 

 in direction of Blacln'ockP. Church, 



10°- 12° W. 

 21° W. 

 18° W. 

 18° W. 



18°-19° "W. 

 58°-59° E. 

 12°-13° W. 

 11°-12° W. 

 5°W. 



54°-55° E. 



21°-22° W. 



21° W. 



12°-13° W. 



18° W. 



17°-18°W. 

 21°-22° W. 

 17°-18° W. 



22°-24° W. 

 2o°-26° W. 



25°-26° W. 



21°-22° W. 

 42°-43° E. 

 17°-18° W. 

 26°-27° W. 



26°-27° W. 

 13° 30'- 14° "W. 



28° 30' W. 

 30° W. 



