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:
Roerdal graben map DE.svg de Tektonische Karte von den sdlichen Niederlanden norden Belgiens und anschlieenden Teile Deutschlands Die wichtigste Strungen sind angegeben Own Woudloper Geological maps of North RhineWestphalia Geological maps of Belgium Geological maps of the Netherlands SVG geology SVG maps in German