magmás

Magmás is a term used in geology to describe phenomena, rocks, or processes related to magma, the molten rock that forms igneous rocks. The concept encompasses the generation, storage, movement, and crystallization of magma within the crust and mantle. Magma originates by partial melting of existing rocks, differentiates as it rises and cools, and may mix with other magmas, producing diverse compositions.

The products are igneous rocks categorized by silica content: felsic, intermediate, mafic, and ultramafic. Magmatic intrusion forms plutons, batholiths, sills, and dikes that crystallize underground, while volcanic activity ejects magma as lava. Understanding magmás helps explain crust formation, tectonics, and volcanic hazards.

In geological literature, magmas are described by composition, temperature, and volatile content, with magmás used as an umbrella term for the molten material and its evolution. Regional usage varies; in some languages, magmás is used as an adjective meaning magmatic or magma-related.