Welcome to Höwenegg
The Höwenegg near Immendingen in the Donaubergland region belongs to the Hegau volcanoes. The surface lake is not a crater lake, but was formed through large-scale basalt quarrying.
The Höwenegg is an official geopoint of the UNESCO Global Geopark Swabian Alb.
The Hegau was a region of intense volcanism around 7 to 12 million years ago. Wartenberg near Geisingen and Höwenegg near Immendingen also belong to the Hegau volcanoes. They are the northernmost of the Hegau volcanoes.
Basaltic volcanic rock was quarried on the Höwenegg from 1900 to 1979 (for paving stones and floor slabs, as well as for road construction)
Geothermal energy also plays a central role for the TuWass thermal and leisure pool in Tuttlingen. During targeted drilling in 1998, the (hoped-for) mineral thermal water was encountered at a depth of about 642 meters.
The temperature, at around 48°C, was significantly higher than expected. Experts suspect a connection with Hegau volcanism.
Source: DZT Knowledge Graph