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.
Summary. 1  Any type of rockâigneous, sedimentary, or metamorphicâcan become a metamorphic rock. 2  Heat and pressure form metamorphic rocks. 3  Magma can cause existing rocks to change into metamorphic rocks. 4  Metamrophic rocks can be classified by their texture: foliated, nonfoliated.eat and/or pressure then change the rock into a metamorphic rock. The change can be physical, chemical, or both. Think of the inside of the Earth is like an oven. The Earth bakes the rocks and chemically changes the minerals inside them.