CONGLOMERATE ROCKS. 579 



B. Consisting of fragments of quartz alone, or 

 father of quartz rock, united in various ways. 



a. With angular fragments* 

 This is a local conglomerate connected with 

 quartz rock, and therefore primary. Occurs in 

 Aberdeenshire near granite, 



V 



b W"ith rounded, or angular and rounded 

 fragments together. 



This forms one of the varieties of quartz 

 rock, under which it is enumerated, 



C, Consisting of fragments of jasper -united by 

 quartz or chalcedony : fragmented agate* 



This is enumerated among the veinstones, 

 but it appears to occur also as a local conglo- 

 merate attached to the jaspers. 



D* Consisting of fragments of gneiss, of different 

 sizes, united by agglutination. 



This is local, attached to gneiss, and often the 

 first bed of the primary sandstone, where that 

 follows gneiss. It is of course primary, and 

 occurs in Scotland in various places on the west 

 coast. 



F. Consisting of fragments of argillaceous schist, 

 re-united by minuter particles and by clay, or imbedded 

 in a continuous schist. 



P p 2 



