Upper Rhine Plain: Difference between revisions

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===The Kaiserstuhl volcano===
The [[Kaiserstuhl]] (literally "Emperor's Chair") is a cluster of volcanic hills to the northwest of Freiburg, within the Rhine Graben. The highest point of this small, isolated volcanic centre is the [[Totenkopf (mountain)|Totenkopf]] (557 metres). Volcanic activity was most prevalent in the [[Miocene]] epoch, some 15 million years ago.<ref>Allen, P.A. & Allen, J.R. 2005. ''Basin Analysis: Principles and Applications'' (Second Edition). Blackwell Publishing.</ref> Today, the Kaiserstuhl volcano is extinct.
==Seismic activity==