Results 21 to 30 of about 2,697 (210)

Stress Constraints From Shear‐Wave Analysis in Shallow Sediments at an Actively Seeping Pockmark on the W‐Svalbard Margin

open access: yesEarth and Space Science, 2023
Mechanisms related to sub‐seabed fluid flow processes are complex and inadequately understood. Petrophysical properties, availability of gases, topography, stress directions, and various geological parameters determine the location and intensity of ...
Sunny Singhroha   +6 more
doaj   +1 more source

First documented record of a living solemyid bivalve in a pockmark of the Nile Deep-sea Fan (eastern Mediterranean Sea) [PDF]

open access: yes, 2011
A living specimen of a solemyid bivalve was collected at bathyal depths near a pockmark in the Nile Deep-sea Fan (eastern Mediterranean) and is here presented.
Clara F. Rodrigues   +7 more
core   +2 more sources

Characterization of the organic matter in pockmark areas of the Southwestern Atlantic upper slope

open access: yesOcean and Coastal Research, 2022
Pockmarks are circular or elliptical structures formed at the seabed by the expulsion of gas from the subsurface. They are widely distributed along the continental margin off southeastern Brazil and can be over a kilometer wide and 100 meters deep ...
Rafael André Lourenço   +16 more
doaj   +2 more sources

Geomorphometric characterization of pockmarks by using a GIS-based semi-automated toolbox [PDF]

open access: yes, 2018
Pockmarks are seabed depressions developed by fluid flow processes that can be found in vast numbers in many marine and lacustrine environments. Manual mapping of these features based on geophysical data is, however, extremely time-consuming and ...
Dolan, Margaret   +2 more
core   +2 more sources

Ecology of a North Sea pockmark with an active methane seep [PDF]

open access: yes, 1991
: At a large North Sea pockmark, with active methane seeps, surface sediments were found to have higher insoluble sulphide concentrations than sedlments from the surrounding area.
Austen, MC   +9 more
core   +1 more source

Distribution and classification of pockmarks on the seabed around western Scotland

open access: yesJournal of Maps, 2019
Pockmarks are seabed depressions that represent primary evidence of rapid biogenic/thermogenic gas build up and fluid release from seabed sediments to the water column.
Allan Audsley   +3 more
doaj   +1 more source

Pockmarks in the inner Oslofjord, Norway [PDF]

open access: yesGeo-Marine Letters, 2008
Multibeam bathymetric surveys of the Inner Oslofjord, Norway have revealed a high density of pockmarks in the 179-km2 inner fjord area, which contains over 500 pockmarks of varying size, typically 20–50 m in diameter and 2–10 m deep. These pockmarks have been investigated with a variety of techniques, including acoustic subbottom profiling ...
Karen E. Webb   +3 more
openaire   +1 more source

The Gela Basin pockmark field in the strait of Sicily (Mediterranean Sea): chemosymbiotic faunal and carbonate signatures of postglacial to modern cold seepage [PDF]

open access: yesBiogeosciences, 2013
The geo-biological exploration of a pockmark field located at ca. 800 m below sea level in the Gela basin (Strait of Sicily, Central Mediterranean) provided a relatively diverse chemosymbiotic community and methane-imprinted carbonates.
M. Taviani   +5 more
doaj   +1 more source

Gas Seepage-Induced Features in the Hypoxic/Anoxic, Shallow, Marine Environment of Amfilochia Bay, Amvrakikos Gulf (Western Greece)

open access: yesGeosciences, 2021
Amfilochia Bay (Eastern Amvrakikos Gulf, Western Greece), a complex marine area affected by tectonism, was investigated for seabed seepage manifestations and for possible inter-relationships between shallow gas accumulations and hypoxia. For this purpose,
Stavroula Kordella   +8 more
doaj   +1 more source

Shallow stratigraphic control on pockmark distribution in north temperate estuaries [PDF]

open access: yes, 2012
This paper is not subject to U.S. copyright. The definitive version was published in Marine Geology 329-331 (2012): 34-45, doi:10.1016/j.margeo.2012.09.006.Pockmark fields occur throughout northern North American temperate estuaries despite the absence ...
Andrews, Brian D.   +6 more
core   +1 more source

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