This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Quarterly journal of the Geological Society of London . PROCEEDINGS OF THE GEOLOGICAL SOCIETY Apr Fig Geological Sketchmap of Part of Bavaria and Bohemia after Giimbel Granite ' Gneissose series Micaschist Clayslate ' Silurian Primordial Zone Silurian except the Primordial Zone Devonian Upper Carboniferous