( 202 ) 



XIV. On Conglomer^ated or Brecciated Rocks;, 

 By Professor Jameson. 

 ( Read Uh December 1813. J 



All the rocks included under this general head, 

 are supposed by mineralogists to be mechanical 

 deposites, and are said to be composed of fragments 

 of different kinds, more or less intimately joined 

 together by means of a ground or basis. It is the 

 object of the present paper to point out the miner 

 ralogical relations of these rocks, and to shew that 

 certain varieties of them are chemical^ not me- 

 chanical, deposites. . 



Section I. 



MINERALOGICAL RELATIONS OF CONGLOMERATED 

 OR BRECCIATED ROCKS. 



Conglomerated rocks occur in Primitive, Tra% 

 sition, and Floetz country. 



