Boston Harbor Islands, Massachusetts

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

  
     
   
 

PEDDOCKS ISLAND, BOSTON HARBOR - Doc Searls Photograph

  
     
 

UPPER BEACH

  
     

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LOWER BEACH

  
     

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TOMBOLO

  
     

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GEORGES ISLAND

  
   
 

GEORGES ISLAND VISITOR'S CENTER - Matthew Miller Photograph

  
     

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SPECTACLE ISLAND

  
   
 

SPECTACLE ISLAND - Doc Searls Photograph

  
     

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CASTLE ISLAND

  
     
   
 

FORT INDEPENDENCE, CASTLE ISLAND - Chris Wood Photograph

  
     
     
 

 

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