Close-up of the top of a hoodoo. This hoodoo was formed in banks of fluvio-glacial alluvium that were deposited on mountainsides during the last glaciations in the Alps. As this glacial clay was eroded by rain and snow melt over thousands of years some rocks protected the clays beneath them. There are two main hypotheses as to why the clay beneath the cap rock becomes harder and more resistant but the outcome is that the loose surrounding clays are washed away and the columns erode at a much slower rate. When the cap rock eventually slips off, the column becomes pointed as the top erodes faster. Called des demoiselles coiffees, (literally Maidens with Hats), Theus, Alpes-Haute, Provence, France. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Chillmaid, Martyn F. |
Bildgröße: | 4480 px × 6720 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |