Earth Pyramids. These spires are an example of a landform known as hoodoos. They are composed of unconsolidated material (moraine) deposited by glaciers during the last Ice Age (about 20,000 years ago). Each pillar is capped by a piece of rock that protects it from erosion. The unprotected material is eroded by rains,gradually forming a spire. Hoodoos form over long periods of time in sites sheltered from winds and in areas that have experienced varying periods of aridity and humidity. Photographed near Bozen,Italy | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Alean, Dr. Juerg |
Bildgröße: | 4672 px × 3104 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |