Sanidnine crystals in trachyte. Close-up of sanidnine crystals (large) in trachyte host rock. Sanidine is a member of the feldspar group of minerals,and within that group it is the high temperature variety of potassium feldspar. It occurs most common in felsic volcanic rocks,like rhyolite or trachyte,as seen here. This sample was found in Perlenhardt,Germany | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5125 px × 3417 px |
Model Release : | Non requis |
Restrictions : | - |