A study was made of beach deposits along the west shore of Lake Michigan for the purpose of determining differences between the wind-laid and water-laid deposits. The bedding is more irregular in the wind-laid than in water-laid material and the lenses vary more in thickness. In individual dunes, sections perpendicular to wind direction show an arching effect in the bedding planes which increases upward. Also the presence of horizontal layers of pebbles indicates water-laid material.

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