Auvergne is not the only region that has a relief marked by relatively recent volcanic constructions. If you are passing through Alsace, take a detour to the other side of the German border. Between Colmar and Freiburg, right in the middle of this long depression known as theit is the Kaiserstuhl, in other words: the “Emperor’s Throne”.
Located in the southwest of Baden-Württemberg, in Germany, a few kilometers from the border, this mountain range is also linked to a volcanic history, dating back 16 to 18 million years.
A volcano in the Rhine plain.
Contrary to, the Kaiserstuhl appears to be a The study of volcanoes is volcanology or volcanology. Volcanic activity is one of…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/d/c/f/dcfcbbf72e_125167_volcan-arenal-costa-rica. jpg” data- url=”https://news.google.com/planete/definitions/volcanologie-volcano-3537/” data-more=”Read more”> lonely However, this is not really the case if we look at the region on a larger scale. This volcanic edifice is in fact part of the great province of central Europe, which has some other volcanoes, including .
The volcano is certainly not very impressive. Largely eroded during the last Origin of the Quaternary glaciations
The…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/c/9/0/c9095f93f2_50015412_map-pleistocene-glaciation-north-arizona-university-dr.jpg” data-url=”https://news.google.com/planet/definitions/climatology-ice-period-1068/” data-more=”Read more”> , rises today to a maximum height of 557 meters and forms an ellipse of 16 x 12 km. As we walk along the slopes of the massif, certain rocks remind us, however, that we are indeed on an ancient volcano. It is these rocks that make the Kaiserstuhl a very special volcano that has long been an enigma for scientists.
Very rare volcanic rocks
if mostissued by the Kaiserstuhl is said due to its composition rich in alkaline components ( , potash) and low silica is a component of many minerals. It is thus found in certain whole foods, in bones and cartilage, for example. Bonded to other atoms (aluminum, magnesium, calcium, etc.), the…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/0/2/9 /029e94324a_93543_silice .jpg” data-url=”https://news.google.com/planete/definitions/geologie-silice-15955/” data-more=”Read more”> (40 to 56% SiOtwo), some rocks found practically do not contain silica (only 0.28 to 5.07%). These last, called , really mark the uniqueness of this volcano. In fact, they are composed of 95% of a very rare composition for volcanic rocks that are often marked by silica dominance.
As a reminder, calcite is the
It forms at high temperature and under high pressure…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/6/1/2/612232a1f7_50034213_gabbro-piotr-sosnowski-wikipedia. jpg” data-url=”https://news.google.com/planete/definitions/structure-terre-magma-461/” data-more=”Read more”> hot.
It is true that we know of very few examples of volcanic carbonatites in other parts of the world, barely a hundred. The volcanoIt is currently the only active volcano that emits this type of although the composition of its carbonatites is not exactly the same as that of the Kaiserstuhl.
Where does this singularity come from?
The origin of carbonatites is still debated. Two hypotheses collide. The first advances the fact that carbonate magmas form directly in the The mantle, although solid, is animated by convection currents that…” data-image=”https://cdn.futura-sciences.com/buildsv6 / images/ midioriginal/7/4/6/7466fb8049_50004180_terre-270907.jpg” data-url=”https://news.google.com/planete/definitions/structure-terre-manteau-terrestre-2495/” data-more = “Read more”>
Atomic number: 20
Electrons per energy level: 2, 8, 8, 2
Atomic mass: 40,078 u
Most stable isotopes: stable 40Ca with 20 neutrons (96.941%), 42Ca…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/e/b/f/ebf2092c20_50154349_calcium . jpg” data-url=”https://news.google.com/sciences/definitions/chemistry-calcium-5069/” data-more=”Read more”> after intense fluid circulation, and with a very low degree of fusion: that is, only a few of the mantle will melt, to form a magma with a very specific composition that, when cooled on the surface, will give carbonatites.
The second hypothesis suggests that the carbonate magma comes from the
Coming from the Earth’s mantle through one or more conduits, the accumulated molten rock can…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/d/d/9/ dd921d8236_45733_def -semhur-volcano-magmatic-chamber-wikimediacommons.jpg” data-url=”https://news.google.com/planet/definitions/structure-earth-magmatic-chamber-451/” data-more=”Read more “> . In fact, it is common to observe this differentiation process during the rise of the magma: it separates into two magma of different composition that will follow different paths in the continental crust forming, as its name indicates, the continents. It is essentially from…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/7/d/1/7d1ca441ac_44707_def-epaisseur-croute-terrestre-usgs.jpg” data- url=”https://news.google.com/planete/definitions/structure-terre-terrestrial-crust-2491/” data-more=”Read more”> . The two hypotheses are not, however, incompatible.
The visit to the Kaiserstuhl is an opportunity for a beautiful walk in the vineyards presented in Description of the terrace
A full-fledged architectural element of a building, the terrace is always found outside of buildings, whether on the ground floor (as in most…” data-image=”https: //cdn.futura-sciences .com/buildsv6/images/midioriginal/9/e/3/9e38056ed3_50037627_terrasse-zigazou76-flickr-cc-by-20.jpg” data-url=”https://news.google.com/house/definitions/terrace- house-10934 /” data-more=”Read more”> on the slopes of the ancient volcano.
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