MANISTIQUE BEACH, SCHOOLCRAFT COUNTY, MICHIGAN |
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The sample was collected from Manistique Beach from the northern shore of Lake Michigan, from a small dune about 65 feet north (inland) from the shore line and about four feet above lake level. Apparently it is still within the seasonal storm serge zone (given the charcoal bits nearby). Patrick F. Fields (Collector) Army Corps of Engineers Photograph |
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GRAIN DISTRIBUTION CHARACTERISTICS (AGI CHART) |
International Space Station 110mm Photograph Image credit: Image Science and Analysis Laboratory, NASA Johnson Space Center | GRAIN SHAPE CHARACTERISTICS(PREPARED BY GAMMA ZETA CHAPTER , SIGMA GAMMA EPSILON, KENT STATE UNIVERSITY - AGI CHART))Roundness is the degree of smoothing due to abrasion of sedimentary particles. It is expressed as the ratio of the average radius of curvature of the edges or corners to the radius of curvature of the maximum inscribed sphere.The sphericity of a particle is: the ratio of the surface area of a sphere (with the same volume as the given particle) to the surface area of the particle. |
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