Eroded glacial rock formation. Boulder (lower right) balanced on top of a column of moraine rock. This is part of the Pyramides d'Euseigne,in the Herens valley,Valais,Switzerland. The rocks are what is left of a large deposit of moraine (ground-up rock debris,lighter rock) and boulders (darker colour) left behind by a glacier retreating at the end of the last Ice Age some 10,000 years ago. The moraine consolidated into a concrete-like mix,but most of it has eroded away,except where it is protected by the more resistant rock of a boulder. The three columns at right have lost their boulders,and will be eroded more swiftly than the column that is still protected | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Szoenyi, Michael |
Bildgröße: | 4430 px × 2953 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |