on the Harlz, 269 



zose rocks are found with the same stratification ; still 

 higher up granite is met with. 



At the rocks of Rosstrap, on the banks of the Bode, at 

 the eastern extremity of the Hartz, I conceived that I also 

 observed a marked stratification in the granite, and a general 

 dip of the beds to the east. I also saw beds of quartz, schis- 

 tose greenstone, and a species of mica slate, which appeared 

 to me to alternate with the granitic beds. M. Schultze no- 

 tices a general stratification, at least as apparent, in the 

 numerous granitic rocks of the Hohneklippe, to the E. of 

 the Brocken. The same person has observed a bed of gran- 

 ite included in rocks of flinty slate and claystone (argilolile) 

 at the foot of the Ramberg, a granite mountain situated one 

 league to S.S.E. of Rosstrapp. 



I have observed on the Adenberg, to the N. of the Hartz, 

 at the extremity of the Lerchenkopfe branch, and on the 

 right bank of the Ocker, a bed of granite distinctly included 

 between the beds of quartz rock and flinty slate of which 

 the mountain is composed. M. de Raumer mentions granite 

 as mixed with the hornfels on the Sandbrink, which forms 

 part of the same chain. This mixture is agaiti found, ia 

 small alternating beds, in the mountain of Rehberg, where 

 however in the end the hornfels covers the granite. On the 

 N.W. of the Brocken, in the mountains which border the 

 Radau, and which are entirely formed of diallage rock 

 (long known by the name of greenstone or primitive trap), 

 many beds of granite have been observed included in that 

 rock.* 



* M. Germar describes the position of these granitic beds ; they have, 

 he says, a direction from S. to N. and dip towards the E. The diallage 

 rock that contains them does not offer any positive stratification ; yet 

 the author considers these granites as evidently forming beds, and he 

 derives, from their different position from that of the greywacke beds, 

 another conclusion against the contemporaneous origin of the two 

 formations. He also supports his opinion by the circumstance, that, 

 throughout the Hartz, the granitic masses appear elongated from S. to 

 N. and consequently in a transvere direction to that of the transition 

 rocks. He considers that these granitic masses of the Hartz correspond 

 with those of the same nature situated in the Thiiringerwald, nearly 

 under the same meridian. 



