Definitions from the Web
Nephelinite
Definition:
Nephelinite is a type of volcanic rock that is characterized by its fine-grained texture and high silica content. It is typically dark in color and contains minerals such as olivine and pyroxene. Nephelinite is found in volcanic regions and is considered to be an extrusive igneous rock.
Sample Sentences:
- The eruption of Mount Vesuvius resulted in the formation of nephelinite deposits.
- Nephelinite is often used in the construction of road aggregates due to its durability.
- The presence of nephelinite in the area indicates a potential volcanic activity.
- The geological survey team collected several samples of nephelinite for analysis.
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