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Warren Dunes State Park is a 1,500-acre (610 ha) public recreation area located along the eastern shore of Lake Michigan in Berrien County, Michigan. [2] The state park's large sand dunes and lakeshore beaches make it one of the most popular of Michigan's state parks with an average of about one million visitors annually.
Sleeping Bear Dunes National Lakeshore is a U.S. national lakeshore in the northwestern Lower Peninsula of Michigan.Located within Benzie and Leelanau counties, the park extends along a 35-mile (56 km) stretch of Lake Michigan's eastern coastline, as well as North and South Manitou islands, preserving a total of 71,199 acres (111 sq mi; 288 km 2).
Sleeping Bear-Glen Lake State Park – (1946–1959) 2,044 acres (5,800 acres in proposed park boundary), centered on state lands received from the federal government in the Sleeping Bear Dunes area, later consolidated with D.H. Day State Park (1959); donated to the National Park Service in 1975 and is now part of the Sleeping Bear Dunes ...
Examples include ripples and dunes on the bed of a river. Bedforms are often preserved in the rock record as a result of being present in a depositional setting. Bedforms are often characteristic to the flow parameters, [1] and may be used to infer flow depth and velocity, and therefore the Froude number.
Warren Dunes State Park, Michigan, on the east shore of Lake Michigan. Grand Sable Dunes, in the Pictured Rocks National Lakeshore, Michigan. Samalayuca Dunes, in the state of Chihuahua, Mexico; Algodones Dunes near Brawley, California. Guadalupe-Nipomo Dunes, on the central coast of California. Monahans Sandhills State Park near Odessa, Texas.
Flow regimes in single-direction (typically fluvial) flow, which at varying speeds and velocities produce different structures, are called bedforms. In the lower flow regime, the natural progression is from a flat bed, to some sediment movement (saltation etc.), to ripples, to slightly larger dunes. Dunes have a vortex in the lee side of the dune.
These sedimentary bedforms are best seen in aerial images and at low sun angles. [20] [21] These giant current ripples are large-to-very-large subaqueous gravel dunes and antidunes. Although they once covered a significantly larger area, they cover about 26 km 2 (10 sq mi) of the Camas prairie basin. The wavelength of these dunes and antidunes ...
Cross-bedding is formed by the downstream migration of bedforms such as ripples or dunes [3] in a flowing fluid. The fluid flow causes sand grains to saltate up the stoss (upstream) side of the bedform and collect at the peak until the angle of repose is reached. At this point, the crest of granular material has grown too large and will be ...