205 



Of! CONGLOMERATED R-OCKS. 



4. Conglomerated Rock associated with Porphyrij\ 



This rock is composed of portions or frag- 

 ments of granite, gneiss, mica-slate, clay-slate, 

 ^c. imbedded in a basis of clay-slate. It lies be- 

 low what is termed the Overlying Primitive Por- 

 phyry, and over clay-slate and other older primi- 

 tive rocks. It occurs in Saxony and other coun- 

 tries in Germany ; also in Upper Egypt. 



5. Conglomerated Limestone, 



This is the rock known to mineralogists under 

 the name verd-antique. It is composed of lime- 

 stone and serpentine, indeterminately aggregated 

 together, and so intermixed as sometimes to pre- 

 sent a conglomerated aspect. 



These are the principal primitive conglomerated 

 rocks I have had an opportunity of examining. 



II. Transition Conglomerated Rocks. 



These are, Grey-Wacke, Sandstone, and Limd» 

 ^tone. 



