Academy of Sciences] 

 No. 1] 



NORTHERN EUROPE. 



21 



Schriesheim which invades the granite is perhaps analogous to the ultrabasic dike-rocks which 

 close the dike-retinue of the Skye plutonic complex. 



Perhaps we should include among intrusions of this age the ultrabasic rocks of the Vosges 

 and Schwarzwald (von Seidlitz '14, Bubnoff '13) and those of Saxony (Bergt '03, Uhlig '07), 

 but much uncertainty is involved in the discussion of these. 



A; 



kg O e> 



X» o o 



^e o a 



Oo\ 



/V.-i- -•,,-.. 



v u a o -i\ — II - '" "f T*. 



O O O <J O \f >-j- -}- -f f 4" Hw 



- oooj; '•-... 44-44., 

 o o o/;d , 4- 4- 4. 4 4- 



0000 



i. o 6 e/^o o\ 

 ■^000 0^0 ci 



' f S s s s s 



/ 



/ 



J' ' f. ,< S > /N* * ' /-~ ,«>/ ^"^£ft 

 j'<f '/''//''/■ , /■ /■ r~ r 

 f'''/'S/ s ' /■ s /^^ S ' 

 .--'/ / / / '//,///, /r?* 



,..-»"' / * / / f. /.. 4.* f * t .4 f. t>. ,f 1 

 :'///'/// //s / / / / , , s 



/'/''/ / s / '/////■/■,, 



' '''''/////';//'?/'/ ' /■ / , 



' / / s '''''ffSfS/rf/'Ss/'/S'*' 



, , , /''////, /S /f /,///// 



' s / ' / s s / /■ / y / r r r , % 1 

 '/'''/''/rrfsfr,/// 

 / / / ' s ///ss/rffr///. 



/ / / s / , '//■/// ' / 



' ' / / sj^\/, s / 



/ / S / s 



/ s ' f / ' ^Cf / s ' / / 



, , . . . JT • . *. : 



-■•/ f 



' / 



■M. 





y 



'ss//'///// /\f 





/sss'sss j- '|T K y ' ^*v v ^ ' ' ' ' <n2 

 •y / s yry , /; \ i-' ' ' ' >?' ' f "' 6S 



Kp i 



Fig. 6.— Geological map of the Brocken massif, Harz Mountains. (After Erdmannsdoerfer.) 

 1. Qabbro and norite with harzbergite, etc. {solid black). 2. Central granite. 3. Marginal porphyritic granite. 4. Hornblende-granite-porphyry. 



In Silesia, a gabbro-peridotite complex is exposed near Zobten, the age of which is at 

 present indefinite. Tannhauser ('08) considers it Devonian, offering rather unconvincing 

 evidence, while Finckh ('12) holds that it is post-Devonian. It may therefore be considered 

 as formed probably during Hercynian folding. Further to the southeast in the Dobschau 

 region, where the Palaeozoic formations have become involved in the Carpathian folds, upper 



