Nördlinger Ries impact structure

	«	For the construction of the fortress of Ingolstadt Carl von Caspers needed suitable building materials. He used Suevite, which he called «Feuerduftstein» (stone smelling of fire) and which he considered volcanic. Left: Almost white Suevite and reddish, so called Bunte Breckzie in the quarry of Aumühle NE of Oetingen. Right: Cover of Casper’s publication from 1792.	»
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