of the North of If eland. 



225 



1 



2 



3 



4 

 5 

 6 



7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 



20 



21 

 22 

 23 



24 



25 

 26 

 27 

 28 



29 



30 

 31 



Locality 



Far-Dunlughy, Donegal 

 Church-home Dunlughy, 



Donegal . . . . . 



Ditto , 



Ditto 



Ditto 



Mein-a-bole, N.W. side of 



Arragh, Donegal 



Ditto 



Ditto 



Ditto 



Ditto 



Ditto 



Ditto 



Ditto 



Ditto 



Ditto 



Alt-na-Calge Dunlughy . 



Ditto 



Ditto 



Rannagh Point, Isle of 



Arran-mor, Donegal 

 Pool-a-Phuca, Church-h 



Fermanagh ; lesser dyk 



South limb 

 Ditto, North limb 

 Ditto, great dyke 

 Lough-na-Croey, Stranag- 



logh mountain, Donegal 

 Dunbeg, Giddore, Donegal 

 (\ghla-mor, Boylagh 

 Trayenagh Bay, Rosses 



Ditto 



Lough Foyle, between 



White and Red Castle 



Tory 



Ditto 



Ditto 



Direction 



of the Dyke 



W. of N. 



hill,) 

 yke> 



21° 



17° 



41° 

 27° 

 34 i 



71 



38 



48 



37 



63 



52i 



44 



4Q 



45 



33 



31 



311 



22 



20 



53 



31 

 35 



49 



19 

 39 

 19 



24 



49 



41 

 18 

 35 



Stratum traversed 



Primitive blue limestone 

 Gneiss and primitive ) 

 granular limestone J 



Direction 



of stratum 



E. of N. 



51° 



55i° 



Angle at 

 which the 

 Dyke cuts 

 the stratum 



Bluish white limestone 



Talcose limestone 



Sienite 



Limestone with madre- 

 pores 



121 



54 



Primitive limestone 



Sienite 



Slaty quartz . . . 



Sienite 



Ditto 



Sandstone . . • 



Porphyritic sienite 



89 



41 

 71 



16 



71" 



72| 



96i 

 82| 

 90 



83| 



50| 



60| 



49| 



751 



65 



56^ 



58| 



574 



47| 



85 



85| 



7Q 



U1 



120 

 124 



90 

 110 



65 



Vol. III. 



«F 



