Desert rose of gypsum crystals. Petal-shaped crystal aggregates of tabular gypsum (hydrated calcium sulphate), which form in arid regions such as the Sahara Desert. The process is a result of early mineral diagenesis (formation of rock from a sediment), especially in salt flats where water evaporation rates are high. The crystals commonly incorporate aeolian (wind-blown) sand grains which contribute to the mineral colour and give it a sandy crystalline texture. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA |
Modell-Rechte: | nicht erforderlich |
Länge: | 35 Sekunden |
Seitenverhältnis: | 16:9 |
Restrictions: | - |