[SunkenCiv]

Thanks Berlin_Freeper. Eugene Shoemaker identified the Ries Basin as a 15 million year old impact structure, and the shocked quartz and such found in the local stone -- including the building stone used for the church -- was formed by that event.

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[OneVike]

Thanks for the ping Civ.

I wish I knew this back when I was stationed in Mannheim in “74”, I would have made it a point to visit the town.