Sleeping Bear Dunes

Videonummer 11924654
Camera tilts from wind-blown marram grass (Ammophila breviligulata) at Sleeping Bear Dunes to Lake Michigan. This lake is one of the five Great Lakes of North America, and the second largest. These freshwater lakes were formed about 10, 000 years ago when great ice sheets, two miles thick, retreated following the last ice age. This grass is able to withstand the arid conditions found in dune sand and helps stablize the dunes. 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. Filmed in Michigan, USA.
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Matulavich, Peter
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Länge: 12 Sekunden
Seitenverhältnis: 4:3
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