On some basaltic mountains of Hesse and 

 Thuringia. By M. dje Hoff. 



Extracted by M. de Bonnard. 

 (Annales des Mines for 1817.) - 



A Memoir by M. de HoiF, inserted in the 5th volume of 

 the Magasin der gesellschaft naturforschender freunde (Ber- 

 lin, 1811), contains a detailed account of many basaltic 

 mountains, noticed slightly at the end of the preceding paper. 



The author in the first place remarks that the southern 

 part of Germany is rich in basaltic rocks, which are on the 

 contrary wanting on the north. He adds, that if a line is 

 drawn from Eisenach to Miinden, and it is prolonged to- 

 wards the N.W., and another line from Haute-Lusace by 

 the Erzgebirge, cutting the first at an angle of from 95° to 

 100°, near Culmbach, in the country of Bayreuth, all that 

 part of the European continent, situated to the north of 

 these two lines, does not contain any basaltic rock,* which 



* M. Haussman however mentions basalt near Sandefiord, in Norway ; 

 but considers that he ought to refer it to the transition series, as well as 

 all the trapean and quartzose rocks that accompany it. He adds, that 

 the south of Norway affords numerous geological paradoxes. Are the 

 rocks mentioned by M. Haussman really basalts, in the general accep- 

 tation given to that name .' (Note of the editor of the Annales des Mines.) 



