122 



MINER A LOGICAL QUERIES. 



shire, occur in an unconformable and over- 

 lying position ; or does it belong to the com- 

 formable primitive-rocks, as clay-slate or mi- 

 ca-slate ? 



b. England. 



1. Does the granite of Cornwall belong to the 

 oldest or to the newest granite formation ; or 

 do both formations occur in that county ? 



2. Is the shorl-rock of Cornwall disposed in an 

 uncomformable and overlying position in re- 

 gard to the older rocks ? If this be its posi- 

 tion, on what rock or rocks does it rest, and 

 what are its other geognostic relations ? 



3. Does the serpentine of Cornwall belong to 

 the first or to the second serpentine formation ; 

 and what are the imbedded and venigenous 

 fossils it contains ? 



4. What are the characters of the different ve- 

 nigenous formations in Cornwall ? Are any of 

 them identical with those described by Wer- 

 ner *, Mohs f , Friesleben J, and others ? 



* " Theory of Veins," translated by Dr Charles Ander- 

 son of Leith, 1809. 



f Beschreibung des Gruben Gebaudes Himmelsfurst, 

 von F, Mohs, 1804. 



X Mineralog Bemerkungen bei gelegenlieit eines 

 Reise durch den merkwurdigsten theil der Harzge- 

 birges, von Friesleben, 1795. 



