Lake Michigan
Videonummer 11924665
| View of Lake Michigan from Sleeping Bear Dunes in Michigan. This freshwater lake is one of the five Great Lakes of North America, and the second largest. The Great Lakes were formed about 10, 000 years ago when great ice sheets, two miles thick, retreated following the last ice age. The dunes are formed by sand that is blown atop glacial moraines, and are referred to as perched sand dunes. Much of the sand is composed of uniform quartz particles that are blown from the adjacent lakeshore and highlands. The grass blowing in the foreground is marram grass (Ammophila breviligulata) which is able to withstand the arid conditions found in dune sand and helps stabilize the dunes. | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Matulavich, Peter |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Länge: | 11 Sekunden |
| Seitenverhältnis: | 4:3 |
| Restrictions: | - |
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