tampon translations: tampon. Learn more in the Cambridge English-French Dictionary.
Metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). The change occurs primarily due to heat, pressure, and the introduction of chemically active fluids.etamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). The change occurs primarily due to heat, pressure, and the introduction of chemically active fluids.
Igneous rocks give rise to a different set of minerals and metamorphic rock types; these include serpentinite, blueschist, soapstone and other rarer species such as eclogite. Metamorphism can be so intense, with all four factors acting at their extreme range, that the foliation can be warped and stirred like taffy; the result of this is migmatite.