"J-Jfi 



1"NDEX. 



Floetz rockSf in the North of Ireland, described 

 Flinly slate, containing Ammonites at Portrush 



covered by Trap in Sky 



Fossil remains, of the Green sandstone of Ireland 

 of the Chalk of Ireland 



Foy, mountain, near Carlingford, chiefly composed of Primi 

 tive Trap ...... 



Garsroen, mountain in Sky, durable nature of 



its base composed of Red sandstone 



in Sky composed of large grained Greenstone 



Geology, may be of service to agriculture 



Gillan, in Sky, order of the beds at . . . 



Glawich mountain, in SJcy, consists of Syenitic rock and Clink 



stone .... 



affects the magnetic needle 



Glen Tilt. A Geological Description of^ by Dr. Mac Culloch 



^i** — connection of its granite with that of the Grampian 



hills ........ 



■ ■ ■« ■ General Geological Description of ... 

 Granite, the prevailing constituent of the Mourne mountains 122 

 and Syenitic granite are geologically the same rock . 



circumstances attending its contact with the stratified 



rocks in Glen Tilt ...... 



found in the Southwestern part of Somersetshire 



veins, passing through Schist and Limestone in Glen Tilt 



Graydon, The Rev. George, on the Dykes of Monte Somma 



in Italy ......... 



Green sand, underlying the Chalk in the North of Ireland 



reposes immediately on Lias in the North of Ireland 



PAGE 



152 

 213 

 98 

 169 

 1G9 



140 



24 

 37 

 65 

 9 

 44 



14 



95 

 259 



302 



311 



-134 



227 



312 

 348 

 268 



Greenstone, occurs in Sky .... 



its characters there 



— occurs in the North of Ireland 



of the North of Ireland, described 



-— Vein of in Glen Tilt 



————— forfhyry, occurs in Sky 



233 



130 



130 



59 



65 



142 



184—304 



281 



59 



