Results 31 to 40 of about 2,201 (156)

Bathymetry and Geomorphology of Shelikof Strait and the Western Gulf of Alaska

Geosciences, 2019
We defined the bathymetry of Shelikof Strait and the western Gulf of Alaska (WGOA) from the edges of the land masses down to about 7000 m deep in the Aleutian Trench.
Mark Zimmermann, Megan M. Prescott, Peter J. Haeussler   +2 more
doaj   +1 more source

Fresh submarine groundwater discharge offshore Wellington (New Zealand): hydroacoustic characteristics and its influence on seafloor geomorphology

Frontiers in Marine Science, 2023
Fresh submarine groundwater discharge (FSGD) influences the biogeochemistry of coastal areas and can be a proxy for potential untapped resources of offshore freshened groundwater (OFG).
Jasper J. L. Hoffmann, Jasper J. L. Hoffmann, Joshu J. Mountjoy, Erica Spain, Mark Gall, Leigh W. Tait, Yoann Ladroit, Aaron Micallef, Aaron Micallef   +8 more
doaj   +1 more source

River Sand and Gravel Mining: Global Drivers, Impacts, and Pathways for Sustainable Management

Reviews of Geophysics, Volume 64, Issue 3, September 2026.
Abstract River sand and gravel are mined worldwide at volumes that now rival their natural replenishment, yet quantitative knowledge of this mining activity and its consequences lags far behind many other global environmental pressures. We synthesize 411 peer‐reviewed studies published since 1974 within a new Driver‐to‐Management Pathway for ...
Edward Park, Christopher R. Hackney, Dung Duc Tran, Mette Bendixen, Jim Best, Kai Wan Yuen, Hannah Runeckles, Md Sadiul Alam Chyon, Karl Kästner, Sonu Kumar, Halinishi Yusuf, Vanessa Lamb, Lars L. Iversen, Aelis Spiller, Rajiv Sinha, Eduardo Francisco da Silva, Enner Alcantara, Chengcheng Wu, Chengpeng Lu, Chu Jian, Jingyu Wang, Nguyen Duc Thien, Lian Feng, Priyank Pravin Patel, Jiachun Huang, Adam D. Switzer   +25 more
wiley   +1 more source

Geophysical and Geochemical Exploration of the Pockmark Field in the Gulf of Patras: New Insights on Formation, Growth and Activity

Applied Sciences, 2023
The Patras Gulf Pockmark field is located in shallow waters offshore Patras City (Greece) and is considered one of the most spectacular and best-documented fluid seepage activities in the Ionian Sea.
Dimitris Christodoulou, George Papatheodorou, Maria Geraga, Giuseppe Etiope, Nikos Giannopoulos, Sotiris Kokkalas, Xenophon Dimas, Elias Fakiris, Spyros Sergiou, Nikos Georgiou, Efthimios Sokos, George Ferentinos   +11 more
doaj   +1 more source

Learning From Crushing Failures: Changes in Physical Properties Reveal the Mechanics of Submarine Carbonate Landslides

Basin Research, Volume 38, Issue 5, September‐October 2026.
Changes in the physical properties of calcareous ooze between intact weak layers and glide planes within the same stratigraphy provide new constraints on the deformation processes and mechanical factors that control the mobility and erosive behaviour of submarine carbonate landslides.
Yan Li, David M. Hodgson, Jeff Peakall, Nan Wu, Mike Clare   +4 more
wiley   +1 more source

Giant pockmarks discovered on the West Greenland shelf

Arctic, Antarctic, and Alpine Research
Pockmarks provide valuable insights into subsurface fluid dynamics, methane release, and potential geohazards. We present the first detailed mapping and characterization of giant pockmarks (>250 m diameter) on the West Greenland continental shelf using ...
Diana W. Krawczyk, Christine L. Batchelor, Aqqaluk D. Sørensen, Jens Lowag   +3 more
doaj   +1 more source

Fluid Pathways and Sources Driving Recurring Pockmark Formation on the Chatham Rise, New Zealand

Basin Research, Volume 38, Issue 5, September‐October 2026.
Quasi‐3D seismic data interpretation and spatial pattern analysis indicate that pockmark formation on the SW Chatham Rise is likely driven by a combination of compaction‐related dewatering during polygonal faulting and silica diagenesis, coupled with deeply‐sourced, possibly CO2‐rich fluids from subducted limestones migrating along prominent basement ...
Fynn Warnke, Ingo A. Pecher, Lorna J. Strachan, Jess I. T. Hillman, Gareth Crutchley   +4 more
wiley   +1 more source

Pockmarks in the Witch Ground Basin, Central North Sea [PDF]

, 2019
Marine sediments host large amounts of methane (CH4), which is a potent greenhouse gas. Quantitative estimates for methane release from marine sediments are scarce, and a poorly constrained ...
Callow, Ben J., Berndt, Christian, Bull, Jonathan M., Lichtschlag, Anna, Geersen, Jacob, Karstens, Jens, Haeckel, Matthias, Schmidt, Mark, Böttner, Christoph, Reinardy, Benedict T.I., Schramm, Bettina, Elger, Judith   +11 more
core   +2 more sources

Uranium Isotope Evidence for Persistent Global Ocean Anoxia Across the Ediacaran–Cambrian Transition in Siberia

Geobiology, Volume 24, Issue 5, September/October 2026.
ABSTRACT The enigmatic Ediacara biota represents Earth's earliest example of macroscopic, complex life, yet the driving forces promoting their mid‐Ediacaran evolution and subsequent extinction across the Ediacaran–Cambrian boundary remain speculative. If these were true animals requiring oxygen for aerobic respiration, their rise has often been linked ...
Andrew D. Doerrler, Tian Gan, Geoffrey J. Gilleaudeau, Matthew G. Pedersen, Natalia Bykova, Vasiliy Marusin, Natalia A. Ivanova, Boris Kochnev, Dimitriy V. Grazhdankin, Karel Kletetschka, Alan J. Kaufman   +10 more
wiley   +1 more source

Evidence of pockmarks and seafloor gas venting in the northwestern Arabian Sea

Communications Earth & Environment
Marine gas seeps are common along tectonically active margins, but they have not been previously observed along the Arabian continental margin. Here we present evidence of gas escape structures, pockmarks, and active gas seeps in the Gulf of Oman ...
Ahmed Abdelmaksoud, Aisha H. Al-Suwaidi, Moamen Ali, Azeem Shah, Sara S. Almehairbi, Lamia M. Al Ali, Mohammed Y. Ali   +6 more
doaj   +1 more source