GEOLOGICAL SOCIETY OF LONDON. 



229 



opposed to succumbing to their ideas, must do our duty in 

 the matter. 



We have devoted a considerable space this month, to 

 the proceedings of the Geological section of the British 

 Association for the advancement of science, at the meeting 

 recently held in Manchester, arranged with as much con- 

 ciseness as possible, for which we are indebted to many 

 talented friends, and the statements in the " Manchester 

 Guardian,^' " Athenseum,'^ and other contemporaries. 



THE EDITOR. 



PROCEEDINGS OP SOCIETIES. 



GEOLOGICAL SOCIETY OF LONDON. 



May 18. — R. 1. Murchison, Esq., President, in the chair. 



A Memoir on the Geological Structure of the Ural Moun- 

 tains^ by Mr. Murchison, M. de Verneuil, and Count Keyser- 

 ling, was read. 



After describing the physical features of the Ural Moun- 

 tains, and the passes by which they may be traversed, the 

 authors proceed to detail the structure of the formations, 

 both sedimentary and igneous, dwelling on the facts pro- 

 duced by the latter, and on the fossil evidence whereby 

 they have been enabled to place the former on a parallel 

 with well known series of rocks in other parts of Russia 

 and Western Europe. The axis, or central portion of the 

 chain, consists to a great extent, of ancient sedimentary 

 strata, for the most part in a highly metamorphic condition, 

 in consequence of numerous syenitic and trap rocks ; but 

 referred by the authors, on account of the presence of 

 certain organic remains, traceable at intervals in limestones, 

 to the Silurian series. Along the eastern flank, the most 

 accessible by reason of the raining establishments, the strata 



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