मैग्मास इसके अंग्रेजी अर्थ का उदाहरण

Melt inclusions are small parcels or "blobs" of molten rock that are trapped within crystals that grow in the magmas that form igneous rocks.

Two of the most common uses of melt inclusions are to study the compositions of magmas present early in the history of specific magma systems.

The formation of melt inclusions appears to be a normal part of the crystallization of minerals within magmas, and they can be found in both volcanic and plutonic rocks.

Hotspot magmas can form by fractionation and contamination of MORB, Nature, v.

Effusive eruptions are most common in basaltic magmas, but they also occur in intermediate and felsic magmas.

Basaltic composition magmas are the most common effusive eruptions because they are not water saturated and have low viscosity.

Silicic magmas most commonly erupt explosively, but they can erupt effusively.

These magmas are water saturated, and many orders of magnitude more viscous than basaltic magmas, making degassing and effusion more complicated.

For silicic magmas to erupt effusively, the ascent rate must be 10^{-5}to 10^{-2} m/s, with permeable conduit walls, so that gas has time to exsolve and dissipate into the surrounding rock.

Silicic magmas typically form blocky lava flows or steep-sided mounds, called lava domes, because their high viscosity does not allow it to flow like that of basaltic magmas.

Porphyry deposits are formed in arc-related settings and are associated with subduction zone magmas.

The magmas responsible for porphyry formation are conventionally thought to be generated by the partial melting of the upper part of post-subduction, stalled slabs that are altered by seawater.

The current belief is that the generation of andesitic magmas is multistage, and involves crustal melting and assimilation of primary basaltic magmas, magma storage at the base of the crust (underplating by dense, mafic magma as it ascends), and magma homogenization.