C 177 ] 



Dumbartonshire. Ayrshire, Fifeshire, and on r the 

 banks of the Brora in Sutherland. Secondary lime- 

 stone and sandstone are found in most of the low 

 countries north of the Mendip hills. 



In Ireland there are five great associations of pri- 

 mary mountains ; the mountains of Morne in the 

 county of Down ; the mountains of Donegal ; those 

 of Mayo and Galway, those of Wicklow, and those 

 of Kerry. The rocks composing the four first of 

 these mountain chains are principally granite, gneis, 

 sienite, micaceous schist, and porphyry. The moun- 

 tains of Kerry are chiefly constituted by granular 

 quartz, and chlorite schist. Coloured marble is found 

 near Killarney; and white marble on the western coast 

 of Donegal. 



Limestone and sandstone are the common secon- 

 dary rocks found south of Dublin. In Sligo, Ros- 

 common, and Leitrim, limestone* sandstone, shale, iron 

 stone, and bituminous coal are found. The second- 

 ary hills in these counties are of considerable eleva- 

 tion ; and many of them have basaltic summits. The 

 northern coast of Ireland is principally basalt ; this 

 rock commonly reposes upon a white limestone, con- 

 taining layers of flint, and the same fossils as chalk ; 

 but it is considerably harder than that rock. There 

 are some instances, in this district, in which columnar 

 basalt is found above sandstone and shale, alternating 

 with coal. The stone coal of Ireland is principally 

 found in Kilkenny, associated with limestone and 

 grauwacke. 



A 2 



