Tag: Geology
Basaltic: what is it?
The term “basaltic” refers to any mineral formation consisting mainly of basalt or having the composition of basalt. We speak for example of basaltic flows, basaltic effusions, basaltic plateaus, basaltic…
Hot spots that are too cold and a geodynamic model of the Earth’s mantle to be reviewed
A new study questions the deep origin of some hot spots thanks to an analysis of their temperature: they are colder than we thought. You will also be interested [EN…
Protrusion: what is it?
In geology, a protrusion represents a construction volcanic domed or needle typical of Pelean volcanism. This type of volcanism refers to Mount Pelée in Martinique, and is characterized by very…
The formation of diamonds is linked to the fragmentation of supercontinents
Diamonds are formed in the bowels of the Earth, at very great depth and high temperature. They rise to the surface through volcanic eruptions. They are thus found prisoners of…
How many supercontinents has the Earth already carried?
The waltz of the continents is part of the geological history of the Earth. Carried away by the tectonics of the plates, the continental masses did not stop gathering in…
Fumerolles: what is it?
Fumaroles are small plumes of gas or vapors of volcanic origin escaping from the ground through cracks, vents or vents. They are associated with zones of volcanism active. We thus…
Recent lava from the Hawaii hotspot is believed to result from intense chemical interactions in the Earth’s mantle
The lavas produced in the volcanoes of certain hot spots have a particularity: they are rich in CO2 and carbonates. The rocks resulting from these magmas are what are called…
There were no “breaths of oxygen” on Earth before the Great Oxygenation
When did oxygen first appear in Earth’s atmosphere? The answer to this crucial question has evolved over the years. And today, once again, researchers are providing new answers. According to…
The formation of diamonds is linked to the great tectonic cycles
Diamonds are formed in the bowels of the Earth, at very great depth and high temperature. They rise to the surface through volcanic eruptions. They are thus found prisoners of…
Andesitis: what is it?
Andesites are part of the large family of volcanic rocks. Of color Light gray that can go to black, andesite has a microlitic structure, which means that the majority of…