14Q DOMAIN I. SIDEROUS. 



Aspect 2. Ferruginous sand-stone, of a light 

 brown, with glandules and veins of a deeper 

 colour, from Mont Calvaire, near Paris, where it 

 is frequent in ferruginous sand, probably arising 

 from its decomposition. 



A ferruginous sand-stone, mentioned by Mr. 

 Kirwan, afforded 19 parts of iron in the 100. 

 The Eisensanderz, or iron sand-stone of the Ger- 

 mans, is of this kind, and is sometimes worked as 

 an ore of iron. 



In the Vosges mountains the summits are often 

 of ferruginous sand-stone, resting on granite*. 

 Dietrich, as already mentioned, thinks that red 

 sand-stone is as primitive as granite itself. 



* Dietrich, Sivry, &c. Saussure says, 699, that the deadlyer 

 of the Germans, or rather deadlayer, is a pudding-stone. 



