350 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Apr. 22, 



Fig. i .—Geological Sketch-map of a Part of Bavaria and Bohemia 



(after Giimbel). 



1. Granite. 



2 "i 



' l Gneissose series. 



3./ 



4. Mica-schist. 



5. Clay-slate. 



('). Silurian Primordial Zone. 



7. Silurian (except the Primordial Zone). 



8. Devonian. 



9. Upper Carboniferous. 



10. Carboniferous. 



11. Eothliegende. 



12. Tertiary. 



A - \ Basalt, 



B. J 



C. Pfahl. 



