IV. Notes on the Mineralogy of the neighbourhood of St. David^s, 



Pembrokeshire. 



^y John KiDD; M.D. Prof. Chem. in the University of Oxford, M.G.S. 



I HE following notes are arranged under separate heads, de- 

 scriptive of particular points of the country adjacent to St. David's, 

 which were visited during a stay of a few days at that place in the 

 summer of 1811 : and for obvious reasons, such points were selected 

 as might from description be easily referred to by others inclined to 

 examine the same ground. 



No order has been adopted in the distribution of these heads than 

 was required for the convenience of description ; for there did not 

 on the spot, and to an unprejudiced observer, appear to be any 

 obvious and natural chain of connexion between the several points 

 here described. 



The country round St. David's, when viewed from an eminence, 

 presents the appearance cf an extensive uneven plain, interspersed 

 with numerous detached hills or rocky summits of an irregularly 

 conical shape. The rocks which constitute these hills bear no 

 marks of regular stratification ; rarely support even a slight degree 

 of vegetation ; and when compared with the surrounding surface, 

 appear as so many nuclei, about which is arranged a very curiously 

 diversified series of highly inclined strata of a kind of slate. The 

 constituent parts of these insulated rocks are felspar and hornblende j 



