Jusi is the residual of a
volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
On Earth, volcanoes are most often found where tectonic plates are ...
, an
erosional outlier of the
Swabian Alb
The Swabian Jura (german: Schwäbische Alb , more rarely ), sometimes also named Swabian Alps in English, is a mountain range in Baden-Württemberg, Germany, extending from southwest to northeast and in width. It is named after the region of ...
,
Baden-Württemberg
Baden-Württemberg (; ), commonly shortened to BW or BaWü, is a German state () in Southwest Germany, east of the Rhine, which forms the southern part of Germany's western border with France. With more than 11.07 million inhabitants across a ...
,
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
.
This category of extinct volcanos is only found within a range of 25 km of
Bad Urach
Bad Urach () is a town in the Reutlingen (district), district of Reutlingen, Baden-Württemberg, Germany. It is situated 14 km east of Reutlingen, at the foot of the Swabian Jura, Swabian ''Alb'' (or Swabian Alps in English), and is known for ...
. It is the largest of the 355 residuals. Many of them are unrecognizable in the geological
relief
Relief is a sculptural method in which the sculpted pieces are bonded to a solid background of the same material. The term ''relief'' is from the Latin verb ''relevo'', to raise. To create a sculpture in relief is to give the impression that the ...
. Their
tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock cont ...
ic
pipe could only be identified by
seismo-electric methods. These volcanos were active in the time before 17 - 16 million years.
Mountains and hills of the Swabian Jura
{{BadenWürttemberg-geo-stub