BOSTON HARBOR ISLANDS, MASSACHUSETTS |
Map of the Boston Harbor Islands National Recreation Area.United States Fish and Wildlife Service |
PEDDOCKS ISLAND |
GEORGES ISLAND |
CASTLE ISLAND |
SPECTACLE ISLAND |
GRAIN DISTRIBUTION CHARACTERISTICS (AGI CHART) |
International Space Station 1150mm 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. |
PEDDOCKS ISLAND |
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PEDDOCKS ISLAND, BOSTON HARBOR - Doc Searls Photograph |
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UPPER BEACH |
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LOWER BEACH |
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TOMBOLO |
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GEORGES ISLAND |
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GEORGES ISLAND VISITOR'S CENTER - Matthew Miller Photograph |
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SPECTACLE ISLAND |
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SPECTACLE ISLAND - Doc Searls Photograph |
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CASTLE ISLAND |
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FORT INDEPENDENCE, CASTLE ISLAND - Chris Wood Photograph |
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