PRINCIPLES 



GEOLOGY, 



BEING 



AN ATTEMPT TO EXPLAIN THE FORMER CHANGES 

 OF THE EARTH'S SURFACE, 



BY REFERENCE TO CAUSES NOW IN OPERATION. 



CHARLES LYELL, ESQ., F.R.S., 



FOR. SEC. TO THB GEOL. SOC., PROF. OF GBOL. TO KING'S COLL., LONDON 



IN THREE VOLUMES. 

 VOL. III. 



LONDON : 

 JOHN MURRAY, ALBEMARLE-STREET. 



MDCCCXXXIIl. 



