Polarised light micrograph of a thin section of basalt,an igneous rock (location unknown). In this image,large coloured crystals appear embedded in the fine-grained basalt matrix. Such crystals are known as phenocrysts. The size of a phenocryst depends on the rate at which it was cooled out of the magma; the larger the crystals the slower the process. Magnification x7 at 6x6cm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Pasieka, Alfred |
Bildgröße: | 4606 px × 4547 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |