Diorite. Diorite is a grey to dark grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine),biotite,hornblende,and/or pyroxene. It may contain small amounts of quartz,microclne and olivine. This sample has a prophyritic texture,porphyry being a general term for indicating igneous rocks that consist of large grains or crystals in a fine grained matrix. In this sample there is a matrix (light grey) of feldspar (andesine),containing grains of pyroxene and hornblende (dark grey) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 5138 px × 3425 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |