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migmatite
This term is used exclusively within the specialized register of geology and petrology. It describes a specific state of rock that exists on the boundary between metamorphic and igneous processes, where the rock has been heated enough to melt partially but not completely.
Because it refers to a specific type of geological material, it is typically treated as an uncountable mass noun when discussing the substance in general. However, it can be used as a countable noun when referring to specific samples or distinct types of migmatite formations.
Ý nghĩa
A mixed rock that has undergone partial melting and recrystallization, typically exhibiting a banded appearance consisting of light-colored granitic layers and dark-colored metamorphic layers.
Ví dụ
The sample of migmatite shows clear evidence of partial melting.
Look at these distinct light and dark bands in the migmatite.
Is this a true migmatite or just a highly deformed gneiss?
The outcrop consists primarily of migmatite and amphibolite.
The outcrop consists primarily of migmatite and amphibolite.
I wonder if this migmatite formed during the late stages of the orogeny.
The professor explained how migmatite represents the transition between metamorphic and igneous rocks.
The professor explained how migmatite represents the transition between metamorphic and igneous rocks.
We found a large vein of quartz cutting through the migmatite.
The texture of the migmatite is characterized by leucosomes and melanosomes.