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U.S. Geological Survey Open-File Report 2011–1149

Sea-Floor Geology of Long Island Sound North of Duck Pond Point, New York

Bottom Photography

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Click on figures for larger images
Thumbnail image of figure 24 and link to larger figure. A photograph of rippled sand in the study area.
Figure 24. Photograph of the sea floor at station 999-13 with rippled sand.
Thumbnail image of figure 26 and link to larger figure. Photograph of the sea floor shoiwng mud on the wall of a bathymetric depression.
Figure 26. Photograph of the sea floor at station 999-6 showing an outcrop of gray cohesive mud on the wall of a scour depression.
Thumbnail image of figure 27 and link to larger figure. Map showing locations of photographs of the sea floor from the study area.
Figure 27. Map showing location of bottom photographs taken during U.S. Geological Survey research vessel Rafael cruise 2010-010 and U.S. Environmental Protection Agency ocean survey vessel Bold cruise 2010-015 north of Duck Pond Point, New York.

Sea-floor photography includes 2 to 9 still photographs and 2 to 5 minutes of video collected at each of the 23 stations in the study area (fig. 27). A total of 86 photographs of the sea floor were taken and are provided in the photo gallery below. The field of view of each image is approximately 50 cm (SEABOSS 50 cm above the bottom).

Most stations in the study area had rippled or megarippled sea floors, typically with shells and shell debris, small burrows, and hermit and spider crabs present (fig. 24). Some stations had fine-grained organic material or mud collecting in the ripple troughs. Snails, clams, fish, anemones, and hydrozoans are also visible in photography from the study area. The three stations located in scour depressions, 999-6, 999-7, and 999-10, all have mud clasts on the sea floor, and photography from 999-6 shows that the gray, cohesive mud crops out on the walls of the scour depression (fig. 26).

Low-resolution images (150 pixels wide) of the photographs may be viewed by browsing the thumbnails in the photo gallery below. These thumbnails are linked to medium-resolution images (600 pixels wide) for more detailed viewing. A WinZip file with all the medium-resolution images may be accessed by clicking here. The WinZip file contains metadata about the photographs and their acquisition. Alternatively, the directory containing the full-resolution images (2560 pixels wide) may be accessed by clicking here. The images can be identified by using the JPEG image names in the galleries below. Individuals interested in obtaining video photography collected in this area may do so at the Data Library of the USGS Woods Hole Coastal and Marine Science Center, Woods Hole, Mass.

 

Photo Gallery

Station  /   Lithologic Description

999-1 / Undulating to faintly rippled sand with a current-swept appearance and scour around larger shells. Tracks and burrows present.

Photograph showing a sandy sea floor.
999-1a		 Photograph showing a sandy sea floor.
999-1b

 

  

 

999-2 / Rippled sand with fine organics or mud in the troughs. Crabs and a trace of razor-clam and crab-shell debris present. Jellyfish in the water column.

Photograph showing a sandy sea floor.
999-2a		 Photograph showing a sandy sea floor.
999-2b		 Photograph showing a sandy sea floor.
999-2c

 

Photograph showing a sandy sea floor.
999-2d

999-3 / Current-rippled sand waves and megaripples with scattered shell debris. Whelk shells and dead, drifting seaweed present.

Photograph showing a sandy sea floor.
999-3a		 Photograph showing a sandy sea floor.
999-3b

 

Photograph showing a sandy sea floor.
999-3c

 

 

999-4 / Rippled sand with light brown mud or fine-grained organic material in ripple troughs. A trace of shell debris and shells.

Photograph showing a sandy sea floor.
999-4a		 Photograph showing a sandy sea floor.
999-4b		 Photograph showing a sandy sea floor.
999-4c		 Photograph showing a sandy sea floor.
999-4d

 

999-5 / Megarippled sand waves with steep slip faces, some shell debris and skates present.

Photograph showing a sandy sea floor.
999-5a		 Photograph showing a sandy sea floor.
999-5b		 Photograph showing a sandy sea floor.
999-5c
Photograph showing a sandy sea floor.
999-5d

 

999-6 / Megarippled sand waves and scour depressions with walls and clasts of gray mud, probably distal deltaic sediment. Shells, spider crabs, and skates present.

Photograph showing a sandy sea floor.
999-6a		 Photograph showing a sandy sea floor.
999-6b		 Photograph showing a sandy sea floor.
999-6c
 Photograph showing a sandy sea floor.
999-6d

 

999-7 / Rippled sand with gray, distal deltaic mud clasts and burrows. Shells, cancer and hermit crabs, moon snails, fish, burrowing anemones, and hydrozoans present.

Photograph showing a sandy and gravelly sea floor.
999-7a

 

 Photograph showing a sandy and gravelly sea floor.
999-7b

 

 Photograph showing a sandy and gravelly sea floor.
999-7c

 

  

999-8 / Rippled sand waves with fine, organic debris or mud in the troughs. Burrowing anemones and spider crabs present.

Photograph showing a sandy sea floor.
999-8a		 Photograph showing a sandy sea floor.
999-8b		 Photograph showing a sandy sea floor.
999-8c
Photograph showing a sandy sea floor.
999-8d

 

999-9 / Rippled sand with shell debris and hydrozoans.

Photograph showing a sandy sea floor.
999-9a		 Photograph showing a sandy sea floor.
999-9b

 

 Photograph showing a sandy sea floor.
999-9c


 

999-10 / Rippled sand and gravelly sediment in a thin veneer over deltaic sediments, with gray mud clasts. Abundant shells with cancer and hermit crabs, moon snails, hydrozoans, and a searobin.

Photograph showing a sandy sea floor.
999-10a		 Photograph showing a sandy sea floor.
999-10b		 Photograph showing a sandy sea floor.
999-10c


 

999-11 / Rippled sand with abundant organic debris in ripple troughs. Hermit crabs and a trace of shell debris are present.

Photograph showing a sandy sea floor.
999-11a		 Photograph showing a sandy sea floor.
999-11b		 Photograph showing a sandy sea floor.
999-11c


 

999-13 / Rippled and megarippled sand with fine organics or mud collecting in the troughs. Burrows, burrowing anemones, snail shells, and shell hash present.

Photograph showing a sandy sea floor.
999-13a		 Photograph showing a sandy sea floor.
999-13b		Photograph showing a sandy sea floor.
999-13c

 
Photograph showing a sandy sea floor.
999-13d		 Photograph showing a sandy sea floor.
999-13e

 

 

999-14 / Rippled sand waves and fine-grained organic material or mud filling troughs. Clasts of gray mud are locally common. Traces of shell debris present.

Photograph showing a bouldery sea floor.
999-14a		 Photograph showing a bouldery sea floor.
999-14b		 Photograph showing a bouldery sea floor.
999-14c
 Photograph showing a bouldery sea floor.
999-14d

 

999-15 / Flat, sandy sea floor with gray mud clasts and abundant shell debris. Spider and hermit crabs, hydrozoans, starfish, sponge, and burrows present.

Photograph showing a sandy sea floor.
999-15a		 Photograph showing a sandy sea floor.
999-15b		Photograph showing a sandy sea floor.
999-15c
 Photograph showing a sandy sea floor.
999-15d
Photograph showing a sandy sea floor.
999-15e		 Photograph showing a sandy sea floor.
999-15f		Photograph showing a sandy sea floor.
999-15g
 
Photograph showing a sandy sea floor.
999-15h		 Photograph showing a sandy sea floor.
999-15i

 

 

999-17 / Rippled sand waves with shell hash collecting in the ripple troughs. Hydrozoans and burrows present. Transect starts on the slip face of a steep sand wave.

Photograph showing a sandy sea floor.
999-17a		 Photograph showing a sandy sea floor.
999-17b

 

Photograph showing a sandy sea floor.
999-17c

 

999-18 / Rippled and megarippled sand waves with some shell debris, burrowing anemones, and hermit crabs.

Photograph showing a sandy sea floor.
999-18a		 Photograph showing a sandy sea floor.
999-18b

 

Photograph showing a sandy sea floor.
999-18c
 Photograph showing a sandy sea floor.
999-18d

 

999-19 / Rippled, fine-grained sand with spider crabs and scattered shells.

Photograph showing a bouldery sea floor.
999-19a		 Photograph showing a bouldery sea floor.
999-19b

 

Photograph showing a bouldery sea floor.
999-19c

 

999-20 / Undulating to faintly rippled, fine-grained sand with burrows and spider crabs.

Photograph showing a sandy and gravelly sea floor.
999-20a		 Photograph showing a sandy and gravelly sea floor.
999-20b

 

Photograph showing a sandy and gravelly sea floor.
999-20c

 

999-21 / Rippled, fine-grained sand with numerous burrows and skates present.

Photograph showing a sandy sea floor.
999-21a		 Photograph showing a sandy sea floor.
999-21b

 

Photograph showing a sandy sea floor.
999-21c

 

999-22 / Faintly rippled, fine-grained sand with burrows and tracks. Moon snail, hermit crab, flounder, and scattered razor clam shells and debris present.

Photograph showing a sandy sea floor.
999-22a		 Photograph showing a sandy sea floor.
999-22b

 

Photograph showing a sandy sea floor.
999-22c

 

999-23A / Megarippled sand with shell debris and an organic or mud veneer in troughs and scattered burrows. Moon snail and casings, hermit and spider crabs, sparse hydrozoans, and scattered razor and clam shells are present.

Photograph showing a sandy sea floor.
999-23Aa		 Photograph showing a sandy sea floor.
999-23Ab

 

Photograph showing a sandy sea floor.
999-23Ac
 Photograph showing a sandy sea floor.
999-23Ad

 

999-23 / Rippled sand with burrows, shells, moon-snail casing, and spider crab present.

Photograph showing a sandy sea floor.
999-23a		 Photograph showing a sandy sea floor.
999-23b

 

Photograph showing a sandy sea floor.
999-23c
 Photograph showing a sandy sea floor.
999-23d

999-24 / Megarippled sand waves with fine-grained brown organic debris in the lee of ripple crests. Burrows and some shell hash present.

Photograph showing a sandy sea floor.
999-24a		 Photograph showing a sandy sea floor.
999-24b

 

Photograph showing a sandy sea floor.
999-24c
 Photograph showing a sandy sea floor.
999-24d
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