MODE VIII. ARGILLACEOUS GLUTENITE. 283 



The same, from Lower Hungary. 



The same, from Pentland hills, near Edinburgh. 



The same, with petrified wood, from Saxony. 



STRUCTURE II. WITH VARIOUS CRYSTALS. 



Argillaceous intrites are also found with inlaid 

 crystals of quartz, calcareous spar, zeolite, and 

 other substances. 



MODE VIII. ARGILLACEOUS GLUTENITE. 



There is scarcely any bricia which belongs to 

 this Domain. Born indeed mentions a clay 

 bricia, consisting of fragments of his metallic 

 rock, joined by an argillaceous cement*. Frag- 

 ments of clay slate are also found united by a 

 spongy argillaceous tufa, an evident decompo- 

 sition of the substance by water. But these in- 

 stances are rare, and of little moment. 



That kind of glutenite called pudding-stone 

 also falls rarely under this Domain, the cement 

 being commonly siderous or siliceous. 



The argillaceous glutenites may as usual be 

 divided into the large and small grained. Even 

 the grauwack of the Germans, the most gene- 



* Raab, i. 414. 



