Results 191 to 200 of about 6,266 (245)

Mega-pockmarks and linear pockmark trains on the West African continental margin

Marine Geology, 2007
Abstract Seabed pockmarks, the manifestation of the natural process of fluid escape at the seabed, are a widespread feature of the equatorial West African continental margin. Pockmarks occur singly, in small groups, in large random fields and in organized arrays or ‘pockmark trains’.
Robin Pilcher, John Argent
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Seafloor pockmarks offshore Vancouver Island

2022
<p>Pockmarks are crater-like depressions of erosive nature in marine or lacustrine sediments. They are often interpreted as the surface manifestation of hydrocarbon venting but may also result from freshwater flow in coastal regions, compaction induced sediment dewatering, or bottom scouring around natural or anthropogenic objects. Hence,
Jacob Geersen, Elena Pesenti, Michael Riedel, Jens Schneider von Deimling, Luisa Rollwage, Noemi Schulze, Martin Scherwath   +6 more
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Seismic clues into the origin of polygonal faulting and pockmarks in the Great South Basin, New Zealand.

Interpretation, 2022
Basin analysis experts use distinctive seismic features like pockmarks or polygonal faulting to understand subsidence histories, migrations pathways, and sedimentation patterns in frontier basins.
J. P. Mora, H. Bedle
semanticscholar   +1 more source

Pockmarks morphology at the Barents sea shelf and its determining factors

Lomonosov Geography Journal
Based on the results of complex geological and geophysical works carried out during the 38th, 52nd and 56th cruises of the R/V “Akademik Nikolaj Strakhov” and the 51st cruise of the R/V “Akademik Boris Petrov”, the fluidogenic relief was studied in ...
A. Denisova, E. A. Eremenko, E. Moroz, A. V. Kohan, E. A. Suhih, R. A. Ananiev, S. Sokolov   +6 more
semanticscholar   +1 more source

Pockmarks off Big Sur, California

Marine Geology, 2002
A pockmark field was discovered during EM-300 multi-beam bathymetric surveys on the lower continental slope off the Big Sur coast of California. The field contains ∼1500 pockmarks which are between 130 and 260 m in diameter, and typically are 8–12 m deep located within a 560 km2 area.
C. Paull, W. Ussler III, N. Maher, H.G. Greene, G. Rehder, T. Lorenson, H. Lee   +6 more
openaire   +1 more source

An AHP-Based Defect Detection Algorithm Study for E-paper Pockmarks Detection

2024 International Conference on Artificial Intelligence and Digital Technology (ICAIDT)
Pockmarks detection in electronic paper (e-paper) mannfactnring plays a crucial role since pockmarks defects compromise the clarity of the e-paper. Current vision-based pockmarks defect detection methods can only be applied to specific models of e-paper ...
Quanjun Sun, Zucheng Huang, Hai Yuan, Weijun Wang, Jian Wang, Xuyao Jiang, Zheng Xu, Quanshuo Sun, Zhenjia Liu   +8 more
semanticscholar   +1 more source

The detection of deep seafloor pockmarks, gas chimneys, and associated features with seafloor seeps using seismic attributes in the West offshore Nile Delta, Egypt

, 2020
The West Delta Deep Marine (WDDM) concession is one of the abundant natural gas resources in the world characterised by the presence of several active gas chimneys conduit feeding pockmarks.
A. Ismail, A. Ismail, H. Ewida, M. G. Al-Ibiary, S. Nazeri, N. Salama, Sergio Gammaldi, A. Zollo   +7 more
semanticscholar   +1 more source

Pockmarks on the Scotian Shelf

Geological Society of America Bulletin, 1970
Pockmarks are cone-shaped despressions that occur in large numbers across the LaHave clay of the Scotian Shelf. They normally range in diameter from 15 to 45 m and in depth from 5 to 10 m. They were possibly formed by ascending gas or subsurface water leakage from underlying coastal plain sediments.
LEWIS H. KING, BRIAN MacLEAN
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Types, characteristics, distribution, and genesis of pockmarks in the South China Sea: insights from high-resolution multibeam bathymetric and multichannel seismic data

Soviet Economy, 2020
Ubiquitous pockmarks in continental margins are important to understand the tectonic and sedimentary history and flow activity of their host margins.
Song Zhu, Xuejie Li, Huodai Zhang, Z. Sha, Zhen Sun   +4 more
semanticscholar   +1 more source

Sedimentary and structural control on pockmark development—evidence from the Nyegga pockmark field, NW European margin

Geo-Marine Letters, 2009
The Nyegga region, located at water depths of about 600–800 m on the NW European continental margin, contains more than 200 pockmarks. Recently collected TOPAS seismic profiles and EM1002 bathymetric records now provide high-resolution information on their seabed and shallow sub-seabed geological setting.
Berit Oline Hjelstuen, Haflidi Haflidason, Hans Petter Sejrup, Atle Nygård   +3 more
openaire   +1 more source