Greisen (Noun)
Meaning
A granitic rock composed of quartz and mica.
Classification
Nouns denoting substances.
Examples
- The outcrop of greisen was weathered and crumbly, revealing a mixture of quartz and mica minerals.
- The geologist carefully collected samples of the greisen for further analysis, noting the high concentration of molybdenum.
- Greisen is characterized by its distinctive mixture of quartz and mica minerals, which gives it a unique texture and appearance.
- The core sample consisted of a dense, granitic greisen intruded by thin veins of pegmatite.
- During the metamorphism process, the granite was altered to form a coarse-grained greisen rich in biotite and muscovite micas.