Geological Society. 459 



Charles Price, M.D. Fellow of Wadham College, Oxford ; 



William Lowndes, Esq. of Somerset Place ; 



Viscount Kirkwall, M.P. ; 



Alexander Sutherland, M.D. of Great George Street, 

 Westminster ; 



George Wiibraham, Esq. of Upper Seymour Street, 

 Portman Square ; 

 were severally elected members of the Society. 



An account of the Isle of Man, by S. F. Berger, M.D. 

 M.G.S. was read. 



The length of the Isle of Man from NE to SW exceeds 

 thirty English miles, and its brcadih varies from eight to 

 fifteen miles. About five miles from the norihern extremity 

 a mountainous tract commences running parallel to the 

 eastern coast of the island, and also forming the small de- 

 tached island called the Calf of Man situated at the southern 

 extremity of the larger one. This belt or chain of high 

 land is divided by three transverse valleys, of which two are 

 situated in the larger island, and the third forms the strait 

 that separates the one island from the other. The highest 

 mountains are situated in the northern division, the most 

 elevated of which, called Sneifeldt, is 2000 feet above the 

 level of the sea. 



The rocks of which this country is composrd belong 

 chiefly to the transition class of Werner. Small gramed 

 granite occurs only in one or two places, and at an elevation 

 of not more than three or four hundred feet above the sea. 

 Gneiss and mica slate appear to be entirely wanting, as also 

 are the oldest members of the clay slate formation. The 

 newer portion of the clay slate formation occupies the most 

 elevated parts of the island, where it appears under the form 

 of horn slate, roofing slate. 



From these rocks the passage to the transition class takes 

 place by insensible degrees : and of this ttie oldest member 

 that presents itself is gray wacke. The tract occupied by 

 this latter rock is for the most part less elevated than that 

 where the clay slate makes its appearance and incloses it. 

 The beds dip south mf)re or less to the east, and this in- 

 clination varies froin vertical to about 35°. In this forma- 

 tion occurs gray wacke, gray wacke slate, and granular 

 quartz, slightly micaceous ; in none of which rocks are any 

 organic remains to be perceived. 



The preceding formation is covered by a deposit of lime- 

 stone less elev:ited above the sea than the gray wacke, and 

 at an inclination approaching nearer to horizontal. It con- 

 sists of beds of shell limestone, resembling that of Kil- 

 kenny, 



