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Northeast U.S. Canyons Exploration - EX 1304 Leg 1

Northeast U.S. Canyons Expedition - EX 1304 Leg 1 Overview Map

The first leg of the 2013 Northeast U.S. Canyons Expedition explored diverse habitats and geological settings of the deep canyons region off the Northeast United States. The remotely operated vehicle Deep Discoverer (ROV D2) completed 16 dives to depths ranging from 500 to 2,200 meters. D2 surveyed four major submarine canyons, including Block, Alvin, Atlantis, and Hydrographer; one unnamed minor canyon; three priority sites considered to be geohazard areas; and three potential (and confirmed) hydrocarbon seep areas.

Submarine Canyons

Exploration of the canyons revealed that they are likely more dynamic, both geologically and biologically, than previously thought and that each canyon may have its own signature geological and biological character over the depths examined. Rock morphology and size differed widely among many dives.

Initial impressions of this exploration also reveal these canyons to be hotspots for biodiversity, hosting more than 25 species of corals; more than seven species of sponges; more than 30 species of fishes; and dozens of crustacean, cephalopod, and echinoderm species. Notable were the numerous faunal range extensions, including several species of crabs and corals.

While exploration of this deep-water canyon system revealed that the community structure of benthic fauna was related to both depth and substrate type, wall failures and breaches were recognized as having a high potential for yielding unstable habitat for the establishment of hard-bottom communities.

USGS Geohazard Sites

The ROV visited three sites prioritized by the U.S. Geological Survey to examine the geological formation, character, and potential instability of the seafloor to estimate relative timing of landslide events and determine whether these areas pose a hazard to tsunami generation. Information gathered during ROV dives will be used to test hypotheses about the evolution of the features in the region and the potential for marine geological hazards.

Hydrocarbon Seeps

The ROV also surveyed three water column anomalies (bubble streams rising from the seafloor) to determine if methane and associated chemosynthetic communities were present. These exploratory dives revealed living chemosynthetic communities, e.g., beds of Bathymodiolus mussels, which hosted at least 10 species, including gastropod snails, polychaete worms, and shrimp associated with hydrocarbon seepage. Two of the dives imaged methane bubbling directly through sediments on the seafloor and also methane hydrates, confirming that the processes that lock methane into ice occur in canyon areas in this region of the Atlantic.

USGS Hazard 3

Dive Track

Area

Northeast U.S. Canyons

Overview

Date:July 9, 2013
Max Depth:1880.0 Meters
Bottom Time:5 Hours 14 Minutes 50 Seconds

Purpose

The purpose of this proposed dive is to investigate headwall scarps of a large landslide scar on the lower continental slope. The scientific rationale for this site is:

  1. To determine if these scarps are relatively young and if they pose a hazard in terms of tsunami generation
  2. To evaluate the long term stability of landslide scars and test hypotheses about their evolution
  3. To attempt to develop a means of using biologic activity on the scarps and deposits as a means of determining relative ages of the features and the response of bottom communities to catastrophic events

Download & View Files

Dive Summary Report (PDF - 738 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 137 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 38 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 45.3 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.27 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 3.5 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 210 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

USGS Hazard 4

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 10, 2013
Max Depth: 608 Meters
Bottom Time: 6 Hours 51 Minutes 50 Seconds

Purpose

The purpose of this proposed dive is to investigate pockmarks on the upper continental slope between 500 and 650 m water depth directly above the headwall scarp of a landslide. The scientific rationale for this site is to:

  1. To investigate the potential for these feature to be created by ephemeral or long-lived fluid flow (gas, water, etc.)
  2. To characterize the pockmark morphology, sediment infilling, and linkages to nearby landslides
  3. To evaluate the long term stability of landslide scars and test hypotheses about their evolution
  4. To attempt to develop a means of using biologic activity on the scarps and deposits as a means of determining relative ages of the features and the response of bottom communities to catastrophic events

Download & View Files

Dive Summary Report (PDF - 808 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 246 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 23.5 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 52.8 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.21 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 3.6 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 302 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

New England Seep 3

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 11, 2013
Max Depth: 1139 Meters
Bottom Time: 6 Hours 11 Minutes 5 Seconds

Purpose

The purpose of the dive was to investigate 4 potential seep sites that were identified based on bubbles plumes seen during 2012 multibeam mapping on the Okeanos explorer. The primary purpose of the dive was to determine if there are methane seeps within the region and to describe both their geology (vigor and extent of seepage, distribution of authigenic carbonates, relationship of seeps to seafloor geology) and their ecology (community structure, distribution of live and dead animals, similarity to faunal assemblages at Veatch seep).

Download & View Files

Dive Summary Report (PDF - 1 MB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 184 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 36.9 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 48.64 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.45 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 4.2 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 260 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

New England Seep 2

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 12, 2013
Max Depth: 1476.1 Meters
Bottom Time: 6 Hours 4 Minutes 21 Seconds

Purpose

The purpose of the dive was to investigate 4 potential seep sites that were identified based on bubble plumes seen during recent multibeam mapping by the Okeanos Explorer including 3 targets that were identified the night before. The primary purpose of the dive was to determine if there are methane seeps within the region and to describe both their geology (vigor and extent of seepage, distribution of authigenic carbonates, relationship of seeps to seafloor geology and their ecology (community structure, distribution of live and dead animals).

Download & View Files

Dive Summary Report (PDF - 730 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 162 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 21.1 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 48.4 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.29 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 4.9 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 226 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Hydrographer Canyon Mid 1

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 13, 2013
Max Depth: 1422.7 Meters
Bottom Time: 5 Hours 44 Minutes 51 Seconds

Purpose

The purpose of the dive was to explore for deep-sea corals (DSC), DSC associates, and other deep-water benthic and mobile fauna such as sponges, fishes and crabs. This was considered a mid-depth dive (~1500-900 m). An additional goal of this dive was to groundtruth a model that predicted the occurrence of DSC associated with slopes >36 degrees.

Download & View Files

Dive Summary Report (PDF - 779 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 162 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 41.5 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 49 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.39 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 5.3 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 313 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Hydrographer Canyon Shallow 2

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 14, 2013
Max Depth: 908.3 Meters
Bottom Time: 6 Hours 51 Minutes 27 Seconds

Purpose

The purpose of the dive was to explore for deep-sea corals (DSC), DSC associates, and other deep-water benthic and mobile fauna such as sponges, fishes and crabs. This was considered a shallow-depth dive (~900-600 m). An additional goal of this dive was to groundtruth a model that predicted the occurrence of DSC associated with slopes >36 degrees.

Download & View Files

Dive Summary Report (PDF - 736 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 214 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 44.8 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 57.7 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.32 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 4.7 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 320 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Atlantis Canyon Mid 1

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 15, 2013
Max Depth: 1105.6 Meters
Bottom Time: 6 Hours 54 Minutes 32 Seconds

Purpose

The purpose of the dive was to characterize submarine canyon geomorphology and characterize benthic habitats in Atlantis Canyon, possibly including deep-sea coral and sponges. This was considered a mid-depth dive (~1100-900 m). An additional goal of this dive was to groundtruth a model that predicted the occurrence of deep-sea corals associated with slopes >36 degrees.

Download & View Files

Dive Summary Report (PDF - 814 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 203 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 25.6 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 58.7 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 497 KB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 5.2 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 351 MB) Download Note: Link takes you to a public FTP server

Atlantis Deep

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 16, 2013
Max Depth: 1793.9 Meters
Bottom Time: 5 Hours 47 Minutes 42 Seconds

Purpose

The purpose of the dive was to:

  1. Characterize the submarine canyon geomorphology and benthic habitats, including possible coral and sponge communities at a depth of ~1800 m on the east wall of Atlantis
  2. Groundtruth a model of predicted deep-sea coral occurrence

Download & View Files

Dive Summary Report (PDF - 701 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 165 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 37.8 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 78 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.63 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 4.8 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 275 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Alvin Canyon Shallow 1

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 17, 2013
Max Depth: 926.9 Meters
Bottom Time: 5 Hours 47 Minutes 27 Seconds

Purpose

The purpose of the dive was to:

  1. Characterize the submarine canyon geomorphology and benthic habitats, including possible coral and sponge communities at a depth of ~900 m on the west wall of Alvin Canyon
  2. Groundtruth a model of predicted deep-sea coral occurrence

Download & View Files

Dive Summary Report (PDF - 789 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 153 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 40.4 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 45 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 3.98 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 4.6 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 894 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Alvin Canyon Mid 2

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 18, 2013
Max Depth: 1109.6 Meters
Bottom Time: 6 Hours 37 Minutes 44 Seconds

Purpose

The purpose of the dive was to:

  1. Characterize the submarine canyon geomorphology and benthic habitats, including possible coral and sponge communities at a depth of ~1100 m on the east wall of Alvin Canyon
  2. Groundtruth a model of predicted deep-sea coral occurrence

Download & View Files

Dive Summary Report (PDF - 717 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 198 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 39.4 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 31 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.25 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 5.5 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 447 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Block Canyon Mid 2

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 19, 2013
Max Depth: 1351 Meters
Bottom Time: 5 Hours 42 Minutes

Purpose

The purpose of the dive was to:

  1. Characterize the submarine canyon geomorphology and benthic habitats, including possible coral and sponge communities at a depth of ~1300 m on the east wall of Alvin Canyon
  2. Groundtruth a model of predicted deep-sea coral occurrence

Download & View Files

Dive Summary Report (PDF - 744 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 154 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 37.8 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 38.2 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.14 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 5.2 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 424 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

USGS Hazard 3

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 20, 2013
Max Depth: 2026.9 Meters
Bottom Time: 5 Hours 46 Minutes 11 Seconds

Purpose

The purpose of this proposed dive is to investigate the transition (marked by the red dashed line on the map) from canyon processes to landslide deposition within Veatch Canyon to establish relative timing of the landslide event. The Veatch Canyon landslide breaches the eastern levee of Veatch Canyon and deposits debris within the canyon, blocking the normal sediment transport pathway. If Veatch Canyon is still active, the landslide may be relatively young (Recent), but if Veatch Canyon has been inactive since the LGM, the landslide may be late Pleistocene in age.

Download & View Files

Dive Summary Report (PDF - 729 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 84 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 37.8 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 23.5 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.46 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 4.9 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 311 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

New England Seep 1

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 21, 2013
Max Depth: 1423.2 Meters
Bottom Time: 6 Hours 53 Minutes 30 Seconds

Purpose

An engineering dive discovered live mussel beds (some with juveniles), extensive dead mussel debris (with methane bubbling), bacterial mats, carbonates, and other indicators of chemosynthetic activity. Our 21 Jul 2013 dive purpose was to resurvey this area, particularly the southern portion that was only documented for moments before recovery of the ROV during the engineering dive. Dive objectives included imaging with lasers, to get estimates of the sizes of the mussels, associated fauna, and rate of bubble ascent from seafloor for at least 1 min. Another objective included groundtruthing a new water column anomaly that was detected by multibeam sonar on the 20th of July.

Download & View Files

Dive Summary Report (PDF - 1 MB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 191 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 26.9 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 35.5 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 5.31 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 4.8 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 329 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Block Canyon Deep

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 22, 2013
Max Depth: 2135.2 Meters
Bottom Time: 4 Hours 46 Minutes 36 Seconds

Purpose

The purpose of the dive was to explore a deep portion of Block Canyon and describe the geomorphology and biological communities along the east wall at a depth of ~2000 m.

Download & View Files

Dive Summary Report (PDF - 304 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 122 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 42.1 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 31.5 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 3.91 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 3.1 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 315 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Block Canyon Deep

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 23, 2013
Max Depth: 1137.7 Meters
Bottom Time: 6 Hours 45 Minutes 38 Seconds

Purpose

The purpose of the dive was to:

  1. Explore a shallow area of Block Canyon and describe the geomorphology and biological communities along the east wall at a depth of ~1100-1000 m
  2. Groundtruth a model that predicted coral occurrence based on slopes of >36 degrees

Download & View Files

Dive Summary Report (PDF - 728 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 196 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 24.5 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 41.5 MB) Download Note: Link takes you to a public FTP server
Camera Sled CTD/Sensor Data (Zip - 4.29 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 7.7 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 373 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool

Block Canyon Deep

Dive Track

Area

Northeast U.S. Canyons

Overview

Date: July 24, 2013
Max Depth: 1121.1 Meters
Bottom Time: 4 Hours 20 Minutes 37 Seconds

Purpose

The purpose of this dive was to describe the geomorphology and benthic communities of both east and west walls in a minor canyon, site named Gauntlet Minor, to a depth of ~1100-1000 m.

Download & View Files

Dive Summary Report (PDF - 620 KB) View/Download Requires Adobe Acrobat Reader to view the Dive Summary Report
Dive Track (KML - 180 KB) View/Download Requires Google Earth or equivalent client to view the Dive Track
ROV Ancillary Data (Zip - 36.1 MB) Download Note: Link takes you to a public FTP server
Dive Trailer (MOV - 77.9 MB) Download Note: Link takes you to a public FTP server
Low-Resolution Video Clips (Zip - 5.5 GB) Download Note: Link takes you to a public FTP server
Underwater Still Images (Zip - 260 MB) Download Note: Link takes you to a public FTP server
Dive Video Collection Self-Service Portal Open Note: Link takes you to an online video discovery and access tool