migmatite: meaning, definition, pronunciation and examples
Very LowTechnical/Geological
Quick answer
What does “migmatite” mean?
A high-grade metamorphic rock that exhibits both metamorphic and igneous characteristics, created by partial melting.
Audio
Pronunciation
Definition
Meaning and Definition
A high-grade metamorphic rock that exhibits both metamorphic and igneous characteristics, created by partial melting.
A complex rock formation resulting from extreme heat and pressure, where a pre-existing metamorphic rock (like gneiss or schist) begins to melt, creating igneous-like veins (leucosome) within a metamorphic host (melanosome). It represents a transitional state between metamorphism and complete melting into magma.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or usage differences.
Connotations
None beyond standard geological terminology.
Frequency
Equally rare and specialised in both dialects.
Grammar
How to Use “migmatite” in a Sentence
The [geological area/unit] consists of migmatite.[Geologists/Studies] have identified migmatite in [location].The rock was classified as a migmatite.The presence of migmatite indicates [geological process/condition].Vocabulary
Collocations
Examples
Examples of “migmatite” in a Sentence
verb
British English
- The intense heat caused the gneiss to migmatise.
- This terrain is known to have been migmatised during the orogeny.
American English
- The intense heat caused the gneiss to migmatize.
- This terrain is known to have been migmatized during the orogeny.
adjective
British English
- The outcrop displayed a migmatitic texture.
- We studied the migmatitic foliation in detail.
American English
- The outcrop displayed a migmatitic texture.
- We studied the migmatitic layering in detail.
Usage
Meaning in Context
Business
Not used.
Academic
Exclusively used in geological sciences, particularly in petrology, metamorphic geology, and tectonics.
Everyday
Virtually never used.
Technical
The primary domain. Used to describe rock textures, infer geological history (P-T-t paths), and discuss crustal melting processes.
Vocabulary
Synonyms of “migmatite”
Strong
Neutral
Weak
Vocabulary
Antonyms of “migmatite”
Watch out
Common Mistakes When Using “migmatite”
- Mispronouncing it as /maɪɡˈmeɪtaɪt/ or /ˈmɪɡnətaɪt/.
- Confusing it with 'migmatitic gneiss' (a type of migmatite).
- Using it as a general term for any banded rock.
FAQ
Frequently Asked Questions
It is a hybrid rock. It is classified as a high-grade metamorphic rock but contains igneous features due to partial melting. It is often called a 'transitional rock'.
The leucosome (light-coloured part) represents the newly crystallized melt fraction, typically with a granitic or felsic composition.
In the deep roots of ancient mountain belts (orogenic cores), in Precambrian shield areas, and in high-grade metamorphic terranes—places where continental crust was once subjected to very high temperatures.
A distinct, often swirling or folded, banded or veined texture where lighter, igneous-looking portions (leucosome) are intimately mixed with darker, metamorphic-looking portions (melanosome).
A high-grade metamorphic rock that exhibits both metamorphic and igneous characteristics, created by partial melting.
Migmatite is usually technical/geological in register.
Migmatite: in British English it is pronounced /ˈmɪɡmətaɪt/, and in American English it is pronounced /ˈmɪɡməˌtaɪt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'MIG' (as in migration or mixing) + 'MAT' (material) + 'ITE' (a rock). It's a rock where material has 'migrated' due to melting and mixed.
Conceptual Metaphor
The rock is a 'snapshot' or a 'fossil' of a process—a moment frozen in time when solid rock was on the verge of becoming liquid.
Practice
Quiz
What primary geological process is responsible for forming migmatite?