NOME XVIII. GLOBULAR ROCK. 



inches : some are seen also of an elongated form ; 

 but the layers are always concentric, and com- 

 posed of parts converging to the centre, or to- 

 wards the axis of the mass. Sometimes these 

 layers, although concentric, are undulating or 

 festooned. These balls, both the large and 

 small, often intermix and arrange themselves in 

 strange forms; and nevertheless the whole is 

 disposed in beds pretty regular, a little inclined, 

 rising to the north or north-east. 



" The spar which forms these balls, is of 

 honey-yellow, or translucid yellowish white ; 

 and the grain is very brilliant. The interstices 

 of the balls are filled with a less dense matter, 

 often cellular and of a coarser tissue, but the 

 nature of which is essentially the same. 



" One cannot but observe in these forms the 

 work of crystallisation ; stalactites and geods are 

 seen to present similar structures ; but an entire 

 mountain, composed of an assemblage of these 

 crystallisations, is a most extraordinary pheno- 

 menon."* 



Sauss. 1478. 



