Definition of Phenocrysts. Meaning of Phenocrysts. Synonyms of Phenocrysts

- diameter. Phenocrysts below this level, but still larger than the groundm**** crystals, are termed microphenocrysts. Very large phenocrysts are termed...
- visibly crystalline, though not as large as the phenocrysts. The crystallization of the phenocrysts during fractional crystallization changes the composition...
- composition first. This forms large, well-shaped euhedral phenocrysts. If these phenocrysts are different in density to the remaining melt, they usually...
- a black appearance when seen in low light. It contains large (10 cm) phenocrysts of alkali feldspar. It is widely used in home renovations and landscaping...
- gl**** in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts are crystals that are larger than the matrix and are identifiable...
- A vitrophyre is a porphyritic volcanic rock in which phenocrysts are embedded in a gl****y matrix. Vitrophyres are contrasted from typical porphyritic...
- Rhomb porphyry is an example with usually large porphyritic rhomb shaped phenocrysts embedded in a very fine-grained matrix. Some of the best known trachytes...
- finer-grained, often microscopic, crystals in which larger crystals, called phenocrysts, are embedded. This porphyritic texture is indicative of multi-stage...
- separate calc-alkaline rocks with oligoclase phenocrysts (dacites) from rocks with orthoclase phenocrysts (rhyolites). Dacite consists mostly of plagioclase...
- solidifies. Most scoria is composed of gl****y fragments and may contain phenocrysts. A sample from Yemen was mainly composed of volcanic gl**** with a few...