Tag: basalt
MORB: what is it?
The term MORB, for Mid-Oceanic Ridge Basalt (basalt mid-ocean ridge, in French) refers to basalts with the typical chemical composition of those formed at ridges. In particular, they make up…
What is the composition of the oceanic crust?
The oceanic crust is one of the two components of the earth’s crust. Very different from continental crust, it is continuously formed at mid-ocean ridges. However, its composition is very…
OIB: what is it?
The term OIB, for Ocean Island Basalt (Where basalt of an oceanic island), refers to basalts having the typical chemical composition of those formed at the level of hot spotsor…
Walk in Ardèche | Case
We will walk in the volcanic mountain, very close to the sources of the Loire, Sainte-Eulalie and the route des sucs, these phonolite mountains so typical of the region. We…
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…