XI. Notice respecting the Geological Structure of the Vicinity of 

 Dublin ; with an Account of some rare Minerals found in 

 Ireland, 



By William Fitton^ M.D. 

 Communicated hy L. Horner, Esq. Sec. to the Geological Society. 



1 HE following observations are to be ascribed principally to the 

 late Rev. Walter Stephens. I present them to the Geological Society 

 in their present imperfect form, with the hope that they may attract 

 the attention of mineralogists to the country in the vicinity of Dub- 

 lin ; for they are sufficient to shew that very interesting information 

 may be expected from a correct examination of that district ; which 

 from its situation is easy of access, and presents many advantages to 

 the observer. I shall subjoin to a brief statement respecting the 

 geological structure of that country, an account of some minerals of 

 not very common occurrence, recently found in Ireland. 



The city of Dublin is placed in a flat limestone country, at the 

 distance of about five miles to the northward of a range of moun- 

 tains, which form the verge of a mountainous district, extending 

 from thence for more than thirty miles to the southward. Through 

 this tract there passes in a south-v/estern direction from the shore on 

 the south side of Dublin bay, a broad body of granite, bounded on 



