Polarised light micrograph of rhyolitic tuff from Withnoe, Devon, UK. Tuff is formed as a result of an explosive volcanic eruption. Rhyolitic tuffs contain glassy fragments, quartz, and alkaline feldspar. It is a relatively soft and easily worked stone and was used in the construction of the elaborate doorway at the entrance to the chapel at Colditz Castle. Magnification: x27 at 10cm wide. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lowry, Steve |
Bildgröße: | 3872 px × 2592 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |