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U.S. Geological Survey Open-File Report 2009-1001

Geological Interpretation of the Sea Floor Offshore of Edgartown, Massachusetts

Skip past contents information Title | List of Figures | Conversion Factors | Abstract | Introduction | Setting | Methods | Bathymetry | Sidescan Sonar | Seismic Profiles | Sediments | Bottom Photography | Data Catalog | Summary | Acknowledgments | References Cited | Contacts

Bottom Photography

Stations 21-37

Station  /   Lithologic Description

E21   /   Undulating sandy bottom with burrows and scattered shell debris (primarily razor clam). Whelk and crabs are present; scour present around obstructions.
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E21A		 Thumbnail of bottom photograph and link to larger image.
E21B		 Thumbnail of bottom photograph and link to larger image.
E21C		 Thumbnail of bottom photograph and link to larger image.
E21D

 

E22   /   Muddy sand with abundant shells (primarily Crepidula) and short reddish seaweed. Whelk and small fish are present.
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E22A		 Thumbnail of bottom photograph and link to larger image.
E22B		 Thumbnail of bottom photograph and link to larger image.
E22C

 

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E22D
E23   /   Undulating sand with abundant burrows. Scattered seaweed; whelk and a trace of shell debris are present.
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E23A		 Thumbnail of bottom photograph and link to larger image.
E23B		 Thumbnail of bottom photograph and link to larger image.
E23C		 Thumbnail of bottom photograph and link to larger image.
E23D

 

E24   /   Sand with abundant shells and shell debris (Crepidula and scallop) and short red seaweed. Whelk are present.
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E24A		 Thumbnail of bottom photograph and link to larger image.
E24B		 Thumbnail of bottom photograph and link to larger image.
E24C


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E24D
E25  /   Sand with abundant shells and shell debris (primarily Crepidula and scallop). Green alga and short seaweed are common; whelk are present.
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E25A		 Thumbnail of bottom photograph and link to larger image.
E25B		 Thumbnail of bottom photograph and link to larger image.
E25C
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E25D

 

E26   /   Flat to undulating muddy sediment covered by a patchy organic mat. Scattered small burrows and small to larger burrows, shell debris, crabs and crab tracks, and whelk are present.
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E26A		 Thumbnail of bottom photograph and link to larger image.
E26B		 Thumbnail of bottom photograph and link to larger image.
E26C


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E26D
E27   /   Flat to undulating muddy sand. Patches of low seaweed and shell debris are present.
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E27A		 Thumbnail of bottom photograph and link to larger image.
E27B		 Thumbnail of bottom photograph and link to larger image.
E27C		 Thumbnail of bottom photograph and link to larger image.
E27D

 

E28  /   Muddy sand with abundant shells (primarily Crepidula) and shell debris. Short red seaweed and whelk are common.
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E28A		 Thumbnail of bottom photograph and link to larger image.
E28B		 Thumbnail of bottom photograph and link to larger image.
E28C
  
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E28D		 Thumbnail of bottom photograph and link to larger image.
E28E

 

 


  
E29   /   Gravel and gravelly sediment with some sandy and bouldery patches. Seaweed is common; whelk egg casings are present. Bottom has a current-swept appearance.
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E29A		 Thumbnail of bottom photograph and link to larger image.
E29B		 Thumbnail of bottom photograph and link to larger image.
E29C
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E29D

 

E30   /   Gravelly sediment with gravel patches. Bottom becomes sandier along drift track. Abundant seaweed; small fish are present.
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E30A		 Thumbnail of bottom photograph and link to larger image.
E30B		 Thumbnail of bottom photograph and link to larger image.
E30C

 
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E30D		 Thumbnail of bottom photograph and link to larger image.
E30E

 

 

 
E31   /   Faintly rippled sand with scattered burrows and shell debris (primarily quahog and razor clam). Spider and hermit crabs and whelk are present.
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E31A		 Thumbnail of bottom photograph and link to larger image.
E31B		 Thumbnail of bottom photograph and link to larger image.
E31C
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E31D

 

E32   /   Sand with abundant shells and shell debris. Seaweed, crabs, whelk and whelk egg casings are present.
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E32A		 Thumbnail of bottom photograph and link to larger image.
E32B		 Thumbnail of bottom photograph and link to larger image.
E32C

 

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E32D
E33   /   Rippled sand with abundant shells and shell debris (primarily razor) and scattered burrows. Spider crabs are common; small fish, whelk, whelk egg casings, and scour depressions around obstructions are present.
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E33A		 Thumbnail of bottom photograph and link to larger image.
E33B		 Thumbnail of bottom photograph and link to larger image.
E33C
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E33D

 

E34   /   Rippled sand with seaweed-rafting clasts and drag marks and shells and shell debris. Burrows, whelk and whelk egg casings, and scour depressions around obstructions are present.
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E34A		 Thumbnail of bottom photograph and link to larger image.
E34B		 Thumbnail of bottom photograph and link to larger image.
E34C		 Thumbnail of bottom photograph and link to larger image.
E34D 

 

E35   /   Rippled sand with seaweed-rafting clasts and drag marks and scattered burrows. Small fish and scour depressions around obstructions are present.
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E35A		 Thumbnail of bottom photograph and link to larger image.
E35B		 Thumbnail of bottom photograph and link to larger image.
E35C		 Thumbnail of bottom photograph and link to larger image.
E35D

 
E36   /   Gravel and patches of rippled sand with patches of eelgrass and other seaweed. Small fish are present.
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E36A		 Thumbnail of bottom photograph and link to larger image.
E36B		 Thumbnail of bottom photograph and link to larger image.
E36C

 

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E36D
E37   /   Rippled sand with scattered gravelly patches and a few seaweed-covered boulders. Small fish, burrows, and horseshoe crabs are present.
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E37A		 Thumbnail of bottom photograph and link to larger image.
E37B		 Thumbnail of bottom photograph and link to larger image.
E37C

 
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E37D		 Thumbnail of bottom photograph and link to larger image.
E37E

 

    

Skip past contents information Title | List of Figures | Conversion Factors | Abstract | Introduction | Setting | Methods | Bathymetry | Sidescan Sonar | Seismic Profiles | Sediments | Bottom Photography | Data Catalog | Summary | Acknowledgments | References Cited | Contacts


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