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Seafloor morphology, geology, and geophysics

Interpretations of seismic reflection transects across a section of the Australia-Antarctic rift margin
Posted inEditors' Highlights

New Data from Earth’s Largest Non-Volcanic Rift Margin

by W. Behr 24 August 202010 August 2020

Seismic reflection images combined with petrological data provide new constraints on the nature of the basement in the enigmatic Australia-Antarctic oceanic-continent transition zone.

Bathymetric map of the world’s oceans with continents blacked out
Posted inNews

Momentum Grows for Mapping the Seafloor

by Randy Showstack 9 December 2019

Initiatives like the Nippon Foundation-GEBCO Seabed 2030 Project can help us better understand the ocean.

Posted inFeatures

The Search for the Severed Head of the Himalayas

by L. Joel 25 April 201928 September 2021

To unearth the very first sediments to erode from the Himalayas, a team of scientists drilled beneath the Bay of Bengal.

View of the Ross ice shelf from the OGS Explora, 9 February 2017.
Posted inScience Updates

Exploring the Unknown of the Ross Sea in Sea Ice–Free Conditions

by Laura De Santis, Florence Colleoni, A. Bergamasco, M. Rebesco, D. Accettella, V. Kovacevic, J. Gales, K. Sookwan and E. Olivo 11 October 201812 October 2018

A team of polar scientists aboard the OGS Explora, cruising in rare ice-free conditions, discovered new evidence of ancient and modern-day ice sheet sensitivity to climatic fluctuations.

The first field measurements of deep-sea turbidity currents reveal the mechanism behind how they transport sediment so far.
Posted inResearch Spotlights

How Do Deep-Sea Gravity Currents Transport Sediment So Far?

by Terri Cook 2 March 2018

The first field measurements of turbidity currents flowing around submarine channel bends indicate spiral flow plays a key role in keeping sediment suspended for hundreds of kilometers.

The spotlights of a remotely operated vehicle illuminate carbonate rock spires of the Lost City hydrothermal vent field in the Atlantic Ocean.
Posted inNews

Deep-Seabed Mining May Come Soon, Says Head of Governing Group

by Randy Showstack 22 November 2017

New regulations could open the door for sustainable mining, says the head of the International Seabed Authority. However, he and others pointed to environmental, financial, and technical challenges.

Scientists aboard the R/V Sonne profiled the seafloor and subsurface near Ritter Island, north of New Guinea, in 2016.
Posted inScience Updates

An 1888 Volcanic Collapse Becomes a Benchmark for Tsunami Models

by A. Micallef, S. F. L. Watt, C. Berndt, M. Urlaub, S.Brune, I. Klaucke, C. Böttner, J. Karstens and J. Elger 10 October 201710 October 2017

When volcanic mountains slide into the sea, they trigger tsunamis. How big are these waves, and how far away can they do damage? Ritter Island provides some answers.

Strips and bands of color off the western coast of Australia indicate the MH370 search area.
Posted inNews

Seafloor Data from Lost Airliner Search Are Publicly Released

by Katherine Kornei 21 July 2017

Detailed maps of the bottom of the Indian Ocean reveal deep canyons and landslides but no wreckage of Malaysia Airlines flight MH370, which went missing in 2014.

Hovercraft-based Arctic sea ice drift research station in February
Posted inScience Updates

Scientists Spend Arctic Winter Adrift on Sea Ice

by Y. Kristoffersen, A. Tholfsen, J. K. Hall and R. Stein 11 October 2016

A hovercraft-based ice drift station gives researchers access to previously inaccessible regions of the changing Arctic sea ice cover off the coast of Greenland.

Satellite photo of Japan
Posted inResearch Spotlights

Earthquakes May Prevent Underwater Landslides

by David Shultz 4 April 20164 April 2016

Smaller quakes around the active edge of continental plates may contribute to increased stability by promoting compaction and solidifying the top 100 meters of seafloor sediment.

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