Cross section of Natrolite from Hohentwiel, Hegau showing radiatiing color zones. Field of view is 20 mm.
| Home | Occurences | World | Europe | Germany |
| Hegau | Hohentwiel | Höwenegg |
| Zeolites - Zeolithe im Hegau, Baden-Württemberg | |
| The Hegau is a about 20x40 km large area NW of Bodensee with several volcanoes of miocene age (about 14 Ma). Two of this Hegau volcanoes are type locations of zeolites. For Natrolite (1803) the Hohentwiel and for Amicite (1979) the Höwenegg. Both locations are now natural reserve area . | |
| The Gelogy of the Hegau at Pinatubo. (in German) | Gelogical Literature Hegau at Geodoc |