Sand dune research. Erosion pins (flags) placed in sand dunes by researchers. These posts are used to measure the erosion or deposition of new sand over time. Photographed at Lake Michigan,Hoffmaster State Park,USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / West, Jim |
Bildgröße: | 4368 px × 2912 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |