Results 31 to 40 of about 6,266 (245)

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

, 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., Barnhardt, Walter A., Belknap, Daniel F., Brothers, Laura L., Hughes Clarke, John E., Kelley, Joseph T., Legere, Christine   +6 more
core   +1 more source

Spontaneously Exsolved Free Gas During Major Storms as an Ephemeral Gas Source for Pockmark Formation

Geochemistry, Geophysics, Geosystems, 2022
Abrupt fluid emissions from shallow marine sediments pose a threat to seafloor installations like wind farms and offshore cables. Quantifying such fluid emissions and linking pockmarks, the seafloor manifestations of fluid escape, to flow in the sub ...
S. Gupta, C. Schmidt, C. Böttner, L. Rüpke, E. H. Hartz   +4 more
doaj   +1 more source

The high-frequency backscattering angular response of gassy sediments: Model/data comparison from the Eel River Margin, California [PDF]

, 2002
A model for the high-frequency backscatter angular response of gassy sediments is proposed. For the interface backscatter contribution we adopted the model developed by Jackson et al. @J. Acoust. Soc. Am. 79, 1410–1422 ~1986!#, but added modifications to
Driscoll, Neal, Fonseca, Luciano E., Mayer, Larry A., Orange, Dan   +3 more
core   +2 more sources

Pockmarks in the fjords of Chilean Patagonia [PDF]

Geological Society, London, Memoirs, 2016
The fjords of Chilean Patagonia are areas of relatively rapid Holocene sediment delivery from glacial, glacifluvial and fluvial systems. These systems are fed by substantial ice- and snow-melt on the flanks of the Andean mountains. Many fjords are infilled by tens of metres of fine-grained, acoustically laminated sediment leading to a relatively flat ...
Dowdeswell, JA, Dowdeswell, EK, Rodrigo, C   +2 more
openaire   +1 more source

Effects of slope instability on pockmark deformation on the continental slope in the southern South China Sea

Frontiers in Marine Science
Pockmark development and slope instability are key geological processes shaping the continental slope. In this study, high-resolution multibeam data, subbottom profiles, and a reprocessed two-dimensional seismic profile were used to identify and analyze ...
Zhihao Liu, Zhihao Liu, Ziyin Wu, Ziyin Wu, Yang Liu, Jihong Shang, Jieqiong Zhou, Jialing Zhang, Jialing Zhang   +8 more
doaj   +1 more source

Buried Pockmarks Associated With Listric Faults of Salt Minibasins (Espírito Santo, SE Brazil): Evidence for Local Hydrocarbon Escape Since the Miocene

Basin Research
Buried pockmarks are features associated with fluid seepage through ancient seafloors. In this work, high‐quality 3D seismic reflection and well data are used to investigate the geometry, distribution and significance of listric faults and associated ...
Qiang Zhang, Tiago M. Alves, M. Martins-Ferreira   +2 more
semanticscholar   +1 more source

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

Geosciences, 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, Dimitris Christodoulou, Elias Fakiris, Maria Geraga, Sotiris Kokkalas, Giuditta Marinaro, Margarita Iatrou, George Ferentinos, George Papatheodorou   +8 more
doaj   +1 more source

Seabed fluid expulsion along the upper slope and outer shelf of the U.S. Atlantic continental margin [PDF]

, 2014
Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 41 (2014): 96-101,
Andrews, Brian D., Brothers, Daniel S., Chaytor, Jason D., Flores, Claudia H., Hill, Jenna C., Kluesner, Jared W., Ruppel, Carolyn D., ten Brink, Uri S.   +7 more
core   +1 more source

Distribution and classification of pockmarks on the seabed around western Scotland

Journal 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, Tom Bradwell, John A. Howe, John M. Baxter   +3 more
doaj   +1 more source

Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait [PDF]

, 2015
Methane expulsion from the world ocean floor is a broadly observed phenomenon known to be episodic. Yet the processes that modulate seepage remain elusive.
Bunz, Stefan, Chand, Shyam, Faverola, Andreia Plaza, Franek, Peter, Johnson, Joel E., Knies, Jochen, Mienert, Jurgen   +6 more
core   +1 more source