4 résultats pour "pyroxènes"

• pyroxène, n.

• pyroxènes - géologie et géophysique.

• Igneous Rock.

  As a magma cools, the first crystals to form will be of minerals that become solid at relatively high temperatures (usually olivine and a type of feldspar known asanorthite). The composition of these early-formed mineral crystals will be different from the initial composition of the magma. Consequently, as these growing crystalstake certain elements out of the magma in certain proportions, the composition of the remaining liquid changes. This process is known as magmatic differentiation.Sometime...

• Le volcan fascine.

  Complétez votre recherche en consultant : Les corrélats Anaximandre Aristote Bunsen Robert Wilhelm Empédocle Etna Ferdinand Hekla Platon Pline - Pline l'Ancien Pompéi Sainte-Claire-Deville Henri Stabies Tazieff Haroun Terre - L'histoire de la Terre - Introduction Thalès Vésuve Les livres Tazieff Haroun, page 5054, volume 9 L'origine des magmas La synthèse des données fournies par différentes études a permis de caractériser la roche- mère des magmas,...