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  • 1
    Keywords: Earth sciences ; Earth Sciences ; Sedimentology ; Oceanography ; Natural disasters ; Geotechnical engineering ; Physical geography ; Earth sciences ; Sedimentology ; Oceanography ; Natural disasters ; Geotechnical engineering ; Physical geography ; Konferenzschrift 2015 ; Submarine Gleitung ; Meeresgeologie ; Submarine Gleitung ; Massenbewegung ; Meeresgeologie ; Meeresboden ; Suspensionsströmung ; Submarine Gleitung ; Turbidit
    Description / Table of Contents: 1. Submarine Mass Movements and Their Consequences: Progress and Challenges -- Part I Submarine Mass Movement in Margin Construction and Economic Significance2. The Role of Submarine Landslides in the Law of the Sea -- 3. Fabric Development and Pore-Throat Reduction in a Mass-Transport Deposit in the Jubilee Gas Field, Eastern Gulf of Mexico: Consequences for the Sealing Capacity of MTDs -- 4. Seismic geomorphology of the Israel Slump Complex in the central Levant Basin (SE Mediterranean) -- 5. Multiple Megaslide Complexes and their Significance for the Miocene stratigraphic evolution of the offshore Amazon Basin -- 6. Kinematics of submarine slope failures in the deepwater Taranaki Basin, New Zealand -- Part II Failure dynamics from landslide geomorphology -- 7. Postglacial Mass Failures in the Inner Hardangerfjorden System, Western Norway -- 8. Onshore and offshore geomorphological features of the El Golfo debris avalanche (El Hierro, Canary Islands) -- 9. New insights on failure and post-failure dynamics of submarine landslides on the intra-slope Palmarola ridge (Central Tyrrhenian Sea) -- 10. Assessment of Canyon Wall Failure Process from Multibeam Bathymetry and Remotely Operated Vehicle (ROV) Observations, U.S. Atlantic Continental Margin -- 11. The Chuí Megaslide Complex: regional-scale submarine landslides on the Southern Brazilian Margin -- 12. Submarine landslides and incised canyons of the southeast Queensland continental margin -- 13. Novel method to map the morphology of submarine landslide headwall scarps using Remotely Operated Vehicles -- 14. Flow behaviour of a giant landslide and debris flow entering Agadir Canyon, NW Africa -- 15. Fine-Scale Morphology of Tubeworm Slump, Monterey Canyon -- 16. Submarine slide topography and the Distribution of Vulnerable Marine Ecosystems: A Case Study in the Ionian Sea (Eastern Mediterranean) -- Part III Geotechnical aspects of mass movement -- 17. Shear Strength of Siliciclastic Sediments from Passive and Active Margins (0-100 meters below seafloor): Insights into Seismic Strengthening -- 18. A small volume calibration chamber for cone penetration testing (CPT) on submarine soils -- 19. Underwater Mass Movements in Lake Mjøsa, Norway -- 20. In situ cyclic softening of marine silts by vibratory CPTU at Orkdalsfjord test site, mid Norway -- 21. First results of the geotechnical in situ investigation for soil characterisation along the upper slope off Vesterålen - Northern Norway -- 22. A novel micro-shear tester for failure analysis of fine and cohesive granular matter -- 23. Knickpoint migration induced by landslide: Evidence from laboratory to field observations in Wabush Lake -- 24. Multiple flow slide experiment in the Westerschelde Estuary, The Netherlands -- Part IV Multidisciplinary case studies -- 25. Submarine mass wasting on Hovgaard Ridge, Fram Strait, European Arctic -- 26. 3D seismic investigations of Pleistocene Mass Transport Deposits and Glacigenic Debris Flows on the North Sea Fan, NE Atlantic Margin -- 27. Do embedded volcaniclastic layers serve as potential glide planes? – An integrated analysis from the Gela Basin offshore southern Sicily -- 28. Sediment failure affecting muddy contourites on the continental slope offshore northern Norway – lessons learned and some outstanding issues -- 29. Mass Wasting History within Lake Ohrid Basin (Albania/Macedonia) over the last 600ka -- 30. Implications of Sediment Dynamics in Mass Transport along the Pianosa Ridge (Northern Tyrrhenian Sea) -- 31. Late-Holocene Mass Movements in High Arctic East Lake, Melville Island (Western Canadian Arctic Archipelago) -- 32. Pleistocene Mass Transport Complexes off Barbados accretionary prism (Lesser Antilles) -- 33. Exploring the Influence of Deepwater Currents as Potential Triggers for Slope Instability -- Part V Tectonics and mass movements -- 34. French alpine foreland Holocene paleoseismicity revealed by coeval mass wasting deposits in glacial lakes -- 35. Spatial and temporal relation of submarine landslides and faults along the Israeli continental slope, eastern Mediterranean -- 36. Earthquake induced landslides in Lake Éternité, Québec, Canada -- 37. Large Mass Transport Deposits in Kumano Basin, Nankai Trough, Japan -- 38. Insights into Effectiveness of Simplified Seismic Displacement Procedures to Evaluate Earthquake Behavior of a Deepwater Slope -- Part VI Fluid flow and gas hydrates -- 39. Deriving the Rate of Salt Rise at the Cape Fear Slide Using New Seismic Data -- 40. Submarine slope instabilities coincident with shallow gas hydrate systems: insights from New Zealand examples -- 41. Eel Canyon Slump Scar and Associated Fluid Venting -- 42. Shallow gas and the development of a weak layer in submarine spreading, Hikurangi margin (New Zealand) -- 43. Stability of fine-grained sediments subject to gas hydrate dissociation in the Arctic continental margin -- Part VII Mass transport deposits in modern and outcrop sedimentology -- 44. Soft-sediment deformation associated with mass transport deposits of the aAnsa basin (Spanish Pyrenees) -- 45. Synsedimentary tectonics and mass wasting along the Alpine margin in Liassic time -- 46. Meso-scale kinematic indicators in exhumed mass transport deposits: definitions and implications -- 47. Morphodynamics of supercritical turbidity currents in the channel-lobe transition zone -- 48. Tiny fossils, big impact: the role of foraminifera-enriched condensed section in arresting the movement of a large retrogressive submarine landslide in the Gulf of Mexico -- 49. Inclusion of substrate blocks within a mass transport deposit: A case study from Cerro Bola, Argentina -- Part VIII Numerical and statistical analysis -- 50. GIS catalogue of submarine landslides in the Spanish Continental Shelf: potential and difficulties for susceptibility assessment -- 51. Tempo and triggering of large submarine landslides – Statistical analysis for hazard assessment -- 52. Morphological controls on submarine slab failures -- 53. Incorporating Correlated Variables into GIS-Based Probabilistic Submarine Slope Stability Assessments -- 54. Quantifying the key role of slope material peak strength – using Discrete Element simulations -- 55. Correction Factors for 1-D Runout Analyses of Selected Submarine Slides -- Part IX Tsunami generation from slope failure -- 56. Volcanic generation of tsunamis: Two New Zealand palaeo-events -- 57. Tsunami-genesis due to retrogressive landslides on an inclined seabed -- 58. Geothermal System as the Cause of the 1979 Landslide Tsunami in Lembata Island, Indonesia -- 59. Towards a spatial probabilistic submarine landslide hazard model for submarine canyons -- 60. Coupled modelling of the failure and tsunami of a submarine debris avalanche offshore central New Zealand -- 61. Observations of coastal landslide-generated tsunami under an ice cover: the case of Lac-des-Seize-Îles, Québec, Canada -- Index.
    Type of Medium: Online Resource
    Pages: Online-Ressource (XIII, 621 p. 256 illus., 219 illus. in color, online resource)
    Edition: 1st ed. 2016
    ISBN: 9783319209791
    Series Statement: Advances in Natural and Technological Hazards Research 41
    RVK:
    Language: English
    Note: 1. Submarine Mass Movements and Their Consequences: Progress and ChallengesPart  I Submarine Mass Movement in Margin Construction and Economic Significance2. The Role of Submarine Landslides in the Law of the Sea -- 3. Fabric Development and Pore-Throat Reduction in a Mass-Transport Deposit in the Jubilee Gas Field, Eastern Gulf of Mexico: Consequences for the Sealing Capacity of MTDs -- 4. Seismic geomorphology of the Israel Slump Complex in the central Levant Basin (SE Mediterranean) -- 5. Multiple Megaslide Complexes and their Significance for the Miocene stratigraphic evolution of the offshore Amazon Basin -- 6. Kinematics of submarine slope failures in the deepwater Taranaki Basin, New Zealand -- Part II Failure dynamics from landslide geomorphology -- 7. Postglacial Mass Failures in the Inner Hardangerfjorden System, Western Norway -- 8. Onshore and offshore geomorphological features of the El Golfo debris avalanche (El Hierro, Canary Islands) -- 9. New insights on failure and post-failure dynamics of submarine landslides on the intra-slope Palmarola ridge (Central Tyrrhenian Sea) -- 10. Assessment of Canyon Wall Failure Process from Multibeam Bathymetry and Remotely Operated Vehicle (ROV) Observations, U.S. Atlantic Continental Margin -- 11. The Chuí Megaslide Complex: regional-scale submarine landslides on the Southern Brazilian Margin -- 12. Submarine landslides and incised canyons of the southeast Queensland continental margin -- 13. Novel method to map the morphology of submarine landslide headwall scarps using Remotely Operated Vehicles -- 14. Flow behaviour of a giant landslide and debris flow entering Agadir Canyon, NW Africa -- 15. Fine-Scale Morphology of Tubeworm Slump, Monterey Canyon -- 16. Submarine slide topography and the Distribution of Vulnerable Marine Ecosystems: A Case Study in the Ionian Sea (Eastern Mediterranean) -- Part III Geotechnical aspects of mass movement -- 17. Shear Strength of Siliciclastic Sediments from Passive and Active Margins (0-100 meters below seafloor): Insights into Seismic Strengthening -- 18. A small volume calibration chamber for cone penetration testing (CPT) on submarine soils -- 19. Underwater Mass Movements in Lake Mjøsa, Norway -- 20. In situ cyclic softening of marine silts by vibratory CPTU at Orkdalsfjord test site, mid Norway -- 21. First results of the geotechnical in situ investigation for soil characterisation along the upper slope off Vesterålen - Northern Norway -- 22. A novel micro-shear tester for failure analysis of fine and cohesive granular matter -- 23. Knickpoint migration induced by landslide: Evidence from laboratory to field observations in Wabush Lake -- 24. Multiple flow slide experiment in the Westerschelde Estuary, The Netherlands -- Part IV Multidisciplinary case studies -- 25. Submarine mass wasting on Hovgaard Ridge, Fram Strait, European Arctic -- 26. 3D seismic investigations of Pleistocene Mass Transport Deposits and Glacigenic Debris Flows on the North Sea Fan, NE Atlantic Margin -- 27. Do embedded volcaniclastic layers serve as potential glide planes? - An integrated analysis from the Gela Basin offshore southern Sicily -- 28. Sediment failure affecting muddy contourites on the continental slope offshore northern Norway - lessons learned and some outstanding issues -- 29. Mass Wasting History within Lake Ohrid Basin (Albania/Macedonia) over the last 600ka -- 30. Implications of Sediment Dynamics in Mass Transport along the Pianosa Ridge (Northern Tyrrhenian Sea) -- 31. Late-Holocene Mass Movements in High Arctic East Lake, Melville Island (Western Canadian Arctic Archipelago) -- 32. Pleistocene Mass Transport Complexes off Barbados accretionary prism (Lesser Antilles) -- 33. Exploring the Influence of Deepwater Currents as Potential Triggers for Slope Instability -- Part V Tectonics and mass movements -- 34. French alpine foreland Holocene paleoseismicity revealed by coeval mass wasting deposits in glacial lakes -- 35. Spatial and temporal relation of submarine landslides and faults along the Israeli continental slope, eastern Mediterranean -- 36. Earthquake induced landslides in Lake Éternité, Québec, Canada -- 37. Large Mass Transport Deposits in Kumano Basin, Nankai Trough, Japan -- 38. Insights into Effectiveness of Simplified Seismic Displacement Procedures to Evaluate Earthquake Behavior of a Deepwater Slope -- Part VI Fluid flow and gas hydrates -- 39. Deriving the Rate of Salt Rise at the Cape Fear Slide Using New Seismic Data -- 40. Submarine slope instabilities coincident with shallow gas hydrate systems: insights from New Zealand examples -- 41. Eel Canyon Slump Scar and Associated Fluid Venting -- 42. Shallow gas and the development of a weak layer in submarine spreading, Hikurangi margin (New Zealand) -- 43. Stability of fine-grained sediments subject to gas hydrate dissociation in the Arctic continental margin -- Part VII Mass transport deposits in modern and outcrop sedimentology -- 44. Soft-sediment deformation associated with mass transport deposits of the aAnsa basin (Spanish Pyrenees) -- 45. Synsedimentary tectonics and mass wasting along the Alpine margin in Liassic time -- 46. Meso-scale kinematic indicators in exhumed mass transport deposits: definitions and implications -- 47. Morphodynamics of supercritical turbidity currents in the channel-lobe transition zone -- 48. Tiny fossils, big impact: the role of foraminifera-enriched condensed section in arresting the movement of a large retrogressive submarine landslide in the Gulf of Mexico -- 49. Inclusion of substrate blocks within a mass transport deposit: A case study from Cerro Bola, Argentina -- Part VIII Numerical and statistical analysis -- 50. GIS catalogue of submarine landslides in the Spanish Continental Shelf: potential and difficulties for susceptibility assessment -- 51. Tempo and triggering of large submarine landslides - Statistical analysis for hazard assessment -- 52. Morphological controls on submarine slab failures -- 53. Incorporating Correlated Variables into GIS-Based Probabilistic Submarine Slope Stability Assessments -- 54. Quantifying the key role of slope material peak strength - using Discrete Element simulations -- 55. Correction Factors for 1-D Runout Analyses of Selected Submarine Slides -- Part IX Tsunami generation from slope failure -- 56. Volcanic generation of tsunamis: Two New Zealand palaeo-events -- 57. Tsunami-genesis due to retrogressive landslides on an inclined seabed -- 58. Geothermal System as the Cause of the 1979 Landslide Tsunami in Lembata Island, Indonesia -- 59. Towards a spatial probabilistic submarine landslide hazard model for submarine canyons -- 60. Coupled modelling of the failure and tsunami of a submarine debris avalanche offshore central New Zealand -- 61. Observations of coastal landslide-generated tsunami under an ice cover: the case of Lac-des-Seize-Îles, Québec, Canada -- Index.
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  • 2
    Keywords: Dissertation ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource ( 165Seiten = 23MB) , Ill., graph. Darst., Kt
    Language: English , German
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  • 3
    Keywords: Dissertation ; Report ; Forschungsbericht ; Hochschulschrift
    Type of Medium: Book
    Pages: 159 S , graph. Darst., Kt
    Series Statement: GEOMAR-Report 47
    Language: English , German
    Note: Zugl.: Kiel, Univ., Diss., 1995
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  • 4
    Keywords: Dissertation ; Hochschulschrift
    Type of Medium: Book
    Pages: 159 S , Ill., graph. Darst., Kt
    Language: English , German
    Note: Kiel, Univ., Diss. : 1995
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  • 5
    In: Marine geology, Amsterdam [u.a.] : Elsevier Science, 1964, (2009), 1872-6151
    In: year:2009
    In: extent:10
    Description / Table of Contents: Porangahau Ridge, located offshore the Wairarapa on the Hikurangi Margin, is an active ocean-continent collision region in northeastern New Zealand coastal waters. Bottom simulating reflections (BSRs) in seismic data indicate the potential for significant gas hydrate deposits across this part of the margin. Beneath Porangahau Ridge a prominent high-amplitude reflection band has been observed to extend from a deep BSR towards the seafloor. Review of the seismic data suggest that this high-amplitude band is caused by local shoaling of the base of gas hydrate stability due to advective heat flow and it may constitute the location of elevated gas hydrate concentrations. During R/V Tangaroa cruise TAN0607 in 2006 heat flow probing for measurements of vertical fluid migration, sediment coring for methane concentrations, and additional seismic profiles were obtained across the ridge. In a subsequent 2007 expedition, on R/V Sonne cruise SO191, a controlled source electromagnetic (CSEM) experiment was conducted along the same seismic, geochemical, and heat flow transect to reveal the electrical resistivity distribution. CSEM data highlight a remarkable coincidence of anomalously high resistivity along the western, landward flank of the ridge which point to locally higher gas hydrate concentration above the high amplitude reflection band. Measured sediment temperature profiles, also along the western flank, consistently show non-linear and concave geothermal gradients typical of advective heat flow. Geochemical data reveal elevated methane concentrations in surface sediments concomitant with a rapid decline in sulfate concentrations indicating elevated methane flux and oxidation of methane in conjunction with sulfate reduction at the landward ridge base. Together, these data sets suggest that the western rim of Porangahau Ridge is a tectonically driven zone of rising fluids that transport methane and cause an upward inflection of the base of gas hydrate stability and the formation of locally enriched gas hydrate above the reflective zone.
    Type of Medium: Online Resource
    Pages: 10 , graph. Darst
    ISSN: 1872-6151
    Language: English
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  • 6
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Oceanography. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (599 pages)
    Edition: 1st ed.
    ISBN: 9783319209791
    Series Statement: Advances in Natural and Technological Hazards Research Series ; v.41
    DDC: 551.468
    Language: English
    Note: Intro -- Preface -- Contents -- Chapter 1: Submarine Mass Movements and Their Consequences: Progress and Challenges -- 1.1 Introduction -- 1.2 The 2015 Volume -- 1.2.1 Part I: Submarine Mass Movement in Margin Construction and Economic Significance -- 1.2.2 Part II: Failure Dynamics from Landslide Geomorphology -- 1.2.3 Part III: Geotechnical Aspects of Mass Movement -- 1.2.4 Part IV: Multidisciplinary Case Studies -- 1.2.5 Part V: Tectonics and Mass Movement Processes -- 1.2.6 Part VI: Fluid Flow and Gas Hydrates -- 1.2.7 Part VII: Mass Transport Deposits in Modern and Outcrop Sedimentology -- 1.2.8 Part VIII: Numerical and Statistical Analysis -- 1.2.9 Part IX: Tsunami Generation from Slope Failure -- 1.3 Looking to the Future -- References -- Part I: Submarine Mass Movement in Margin Construction and Economic Significance -- Chapter 2: The Role of Submarine Landslides in the Law of the Sea -- 2.1 Introduction -- 2.2 Case Studies -- 2.2.1 Rift Margins -- 2.2.1.1 Ireland, Porcupine Bank -- 2.2.1.2 Norway, Bear Island (Bjørnøya) and Franz-Victoria Trough Mouth Fans (TMF) -- 2.2.2 Transform Margins -- 2.2.2.1 France: French Guiana -- 2.2.3 Active Margins -- 2.2.3.1 Indonesia: Northwest Sumatra -- 2.3 Conclusions -- References -- Chapter 3: Fabric Development and Pore-Throat Reduction in a Mass-Transport Deposit in the Jubilee Gas Field, Eastern Gulf of ... -- 3.1 Introduction -- 3.2 Geologic Setting -- 3.3 Available Data and Methodology -- 3.4 Subsurface Expression of the Top-Seal MTD -- 3.5 Clay Fabric of the Top-Seal MTD: XRD, MICP, and XRTG Results -- 3.6 Discussion and Conclusion -- References -- Chapter 4: Seismic Geomorphology of the Israel Slump Complex in the Levant Basin (SE Mediterranean) -- 4.1 Introduction -- 4.2 Geological Setting -- 4.3 Dataset and Methodology -- 4.4 Geomorphology of the MTDs -- 4.5 Discussion and Conclusions. , References -- Chapter 5: Multiple Megaslide Complexes and Their Significance for the Miocene Stratigraphic Evolution of the Offshore Amazon ... -- 5.1 Introduction -- 5.1.1 Database and Methods -- 5.2 Results -- 5.2.1 The Amap Megaslide Complex (AMC) -- 5.2.2 The Central Amazon Fan Megaslide Complex (CAFMC) -- 5.2.3 The Par-Maranhão Megaslide Complex (PMMC) -- 5.3 Discussion -- 5.4 Conclusions -- References -- Chapter 6: Kinematics of Submarine Slope Failures in the Deepwater Taranaki Basin, New Zealand -- 6.1 Introduction -- 6.2 Data and Methods -- 6.3 Geological Framework -- 6.4 Results and Interpretations -- 6.4.1 MTD 1 -- 6.4.2 MTD 2 -- 6.5 Discussion -- 6.6 Conclusions -- References -- Part II: Failure Dynamics from Landslide Geomorphology -- Chapter 7: Postglacial Mass Failures in the Inner Hardangerfjorden System, Western Norway -- 7.1 Introduction -- 7.2 Study Site and Geological Setting -- 7.3 Data and Methods -- 7.4 Main Observations and Interpretations -- 7.5 Discussion -- 7.6 Conclusions -- References -- Chapter 8: Onshore and Offshore Geomorphological Features of the El Golfo Debris Avalanche (El Hierro, Canary Islands) -- 8.1 Introduction -- 8.1.1 Geological and Geomorphological Setting -- 8.1.2 Methods -- 8.2 Results -- 8.2.1 Morphology and Backscatter Mapping -- 8.2.2 Seismic Mapping -- 8.3 Discussion and Conclusions -- References -- Chapter 9: New Insights on Failure and Post-failure Dynamics of Submarine Landslides on the Intra-slope Palmarola Ridge (Centr... -- 9.1 Introduction -- 9.2 Geological Setting -- 9.3 Data and Methods -- 9.4 Results -- 9.4.1 General Morphology of Palmarola Ridge -- 9.4.2 Landslide Scars and Deposits -- 9.5 Discussions and Conclusions -- References -- Chapter 10: Assessment of Canyon Wall Failure Process from Multibeam Bathymetry and Remotely Operated Vehicle (ROV) Observatio... -- 10.1 Introduction. , 10.2 Data -- 10.3 Results -- 10.3.1 Canyon Morphology and Exposed Lithologies -- 10.3.2 Benthic Communities -- 10.3.3 Failure Processes and Erosion -- 10.3.3.1 Cohesive Failure Processes -- 10.3.3.2 Erosion -- 10.4 ``Biomarkers´´ as Failure Timing and Magnitude Indicators -- 10.5 Future Work -- References -- Chapter 11: The Chuí Megaslide Complex: Regional-Scale Submarine Landslides on the Southern Brazilian Margin -- 11.1 Introduction and Backgrounds -- 11.2 Data and Methods -- 11.3 Results and Discussions -- 11.3.1 Geomorphological Characterization -- 11.3.2 Seismic Architecture and Depositional Features -- 11.3.3 Possible Preconditioning Parameters and Triggering Mechanisms -- 11.4 Conclusions -- References -- Chapter 12: Submarine Landslides and Incised Canyons of the Southeast Queensland Continental Margin -- 12.1 Introduction -- 12.2 Study Area Location and Bathymetric Features -- 12.3 Sediment Sample Characteristics and Ages -- 12.3.1 Dredge Sample Ages -- 12.3.2 Core Sample Ages -- 12.4 Discussion and Conclusions -- References -- Chapter 13: Novel Method to Map the Morphology of Submarine Landslide Headwall Scarps Using Remotely Operated Vehicles -- 13.1 Introduction -- 13.2 Rockall Bank -- 13.3 Method -- 13.3.1 Data Collection -- 13.3.2 Data Processing -- 13.4 Results -- 13.5 Interpretation and Discussion -- 13.6 Conclusions and Further Work -- References -- Chapter 14: Flow Behaviour of a Giant Landslide and Debris Flow Entering Agadir Canyon, NW Africa -- 14.1 Introduction -- 14.2 Methods -- 14.3 Results -- 14.3.1 The Headwall Area and the Slide Fairway -- 14.3.2 Slide Fairway into Lower Agadir Canyon -- 14.4 Discussion and Conclusion -- References -- Chapter 15: Fine-Scale Morphology of Tubeworm Slump, Monterey Canyon -- 15.1 Introduction -- 15.2 Methods -- 15.3 Results -- 15.3.1 Surface of Smooth Ridge Surrounding Tubeworm Slump. , 15.3.2 Main Headwall Scarp -- 15.3.3 Sole of Slide Scar -- 15.4 Discussion and Conclusions -- References -- Chapter 16: Submarine Slide Topography and the Distribution of Vulnerable Marine Ecosystems: A Case Study in the Ionian Sea (E... -- 16.1 Introduction -- 16.2 Submarine Slide Topography on the Ionian Margin -- 16.3 Deep-Sea Habitats of the Ionian Margin and Relationships with Landslide Morphologies -- 16.4 Economic Significance of Submarine Landslide Areas -- References -- Part III: Geotechnical Aspects of Mass Movement -- Chapter 17: Shear Strength of Siliciclastic Sediments from Passive and Active Margins (0-100m Below Seafloor): Insights into S... -- 17.1 Background and Significance -- 17.2 Global Shear Strength Trends -- 17.3 Ideal Type Sites -- 17.4 Hydrostatic Pore Pressure Conditions at Type Sites -- 17.5 Continental Margin Sediment Shear Strength -- References -- Chapter 18: A Small Volume Calibration Chamber for Cone Penetration Testing (CPT) on Submarine Soils -- 18.1 Introduction -- 18.2 Methods -- 18.2.1 New MARCC Calibration Chamber Design -- 18.2.2 Sensors, Control and Measurement Devices -- 18.3 Results -- 18.3.1 Specimen Preparation and Cuxhaven Test Sand -- 18.3.2 Laboratory CPT Experiments -- 18.4 Discussion -- 18.5 Conclusion and Outlook -- References -- Chapter 19: Underwater Mass Movements in Lake Mjøsa, Norway -- 19.1 Introduction -- 19.2 Methods -- 19.2.1 Morphology -- 19.2.2 Slope Stability -- 19.2.3 Discussion -- References -- Chapter 20: In Situ Cyclic Softening of Marine Silts by Vibratory CPTU at Orkdalsfjord Test Site, Mid Norway -- 20.1 Introduction -- 20.2 Geological Setting -- 20.3 Material and Methods -- 20.3.1 CPTU -- 20.3.2 Triaxial Laboratory Testing -- 20.4 Results -- 20.4.1 Geotechnical Characterization of Silt Layers -- 20.4.2 Cyclic Triaxial Response of Silt Layers -- 20.5 Discussion and Conclusion. , References -- Chapter 21: First Results of the Geotechnical In Situ Investigation for Soil Characterisation Along the Upper Slope Off Vester... -- 21.1 Landslides Along the Slope Off Vesterålen -- 21.2 Methods -- 21.2.1 Sub-bottom Mapping -- 21.2.2 CPTU Investigation of Slope Sediments -- 21.2.3 Pseudo-static Factor of Safety (FoS) -- 21.3 Results -- 21.3.1 Sedimentological and Geotechnical Characterisation of Slope Sediments -- 21.3.2 Pseudo-static Slope Stability Analysis -- 21.4 Discussion and Outlook -- References -- Chapter 22: A Novel Micro-shear Tester for Failure Analysis of Fine and Cohesive Granular Matter -- 22.1 Introduction -- 22.2 Characterization of the Calcium Carbonate Sample -- 22.3 Micro Shear Tester and X-ray Computed Tomography -- 22.3.1 Micro Shear Tester -- 22.3.2 X-ray Computed Tomography (XCT) -- 22.3.3 Combination of muST and XCT -- 22.4 Conclusion -- References -- Chapter 23: Knickpoint Migration Induced by Landslide: Evidence from Laboratory to Field Observations in Wabush Lake -- 23.1 Introduction -- 23.2 Wabush Lake -- 23.3 Methodology -- 23.3.1 Geotechnical Properties -- 23.3.2 Excess Pore Pressure and Stability Analysis -- 23.4 Results -- 23.4.1 Geotechnical Tests -- 23.4.2 Excess Pore Water Pressure and Stability Analysis -- 23.5 Discussion -- 23.6 Conclusion -- References -- Chapter 24: Multiple Flow Slide Experiment in the Westerschelde Estuary, The Netherlands -- 24.1 Introduction -- 24.2 Field Test Set-Up -- 24.3 Applied Instrumentation -- 24.4 Results and Conclusions -- References -- Part IV: Multidisciplinary Case Studies -- Chapter 25: Submarine Mass Wasting on Hovgaard Ridge, Fram Strait, European Arctic -- 25.1 Introduction -- 25.2 Study Area -- 25.3 Material and Methods -- 25.4 Results -- 25.4.1 Western Slope -- 25.4.2 Eastern Slope -- 25.5 Discussion -- 25.6 Conclusions -- References. , Chapter 26: 3D Seismic Investigations of Pleistocene Mass Transport Deposits and Glacigenic Debris Flows on the North Sea Fan,.
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 420 (2002), S. 622-623 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Gas hydrates are an ice-like form of water that has cavities containing gas — usually methane. They exist in vast quantities beneath the ocean floor in certain areas, especially continental margins, where the methane is generated mostly from the bacterial breakdown of organic matter, and they ...
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  • 8
    Publication Date: 2021-02-08
    Description: Submarine currents are a principal factor in controlling seafloor geomorphology. Herein, we investigate the role of dynamic current systems associated with the Subtropical Front in the formation and modification of seafloor depressions off the east coast of New Zealand’s South Island. Seafloor depressions are widespread in this region, with a diverse range of morphologies and sizes. We focus on two ‘end-member’ classes of depressions; densely spaced decametre-scale structures and more isolated ‘giant’ depressions of up to 12 km in diameter. Our results reveal a direct correlation between the dominant current flow direction, and the modification and alignment of depressions. We present a model to illustrate the role of submarine currents in shaping the morphology of these enigmatic seafloor depressions. This model demonstrates how contour currents, and potentially eddy currents, have extensively modified seafloor structures, resulting in elongate, asymmetrical depressions, partially infilled by sediment drift deposits.
    Type: Article , PeerReviewed
    Format: text
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  • 9
    Publication Date: 2021-05-10
    Description: Highlights • 3D seismic imaging of an entire landslide complex. • Shallow gas accumulation within and underneath Tuaheni Landslide Complex. • Imaging of a basal shear zone within a subaqueous landslide complex. Abstract The Hikurangi margin is an active continental margin east of New Zealand's North Island. It is well recognized as a seismically active zone and is known for the occurrence of free gas and gas hydrates within the shallow sediments. A variety of subaqueous landslides can be observed at the margin, including the Tuaheni Landslide Complex off Poverty Bay. This slide complex has been interpreted previously as a slowly creeping landform, as its morphology and internal deformation is comparable to terrestrial earthflows and rock glaciers. In 2014, we acquired a high-resolution 3D seismic volume covering major parts of the Tuaheni South landslide. The 3D data show a variety of fluid migration indicators, free gas accumulations and manifestations of the base of gas hydrate stability in the pre-slide sedimentary units and the lower unit of the landslide system. The data also show that the landslide system is composed of an upper and lower unit that are separated by an intra-debris negative-polarity reflection. Free gas accumulations directly beneath the landslide units suggest that the debris acts as a boundary for rising fluids and only few migration pathways to the intra-debris reflector are observed in the distal parts of the landslide. Deformation within the landslide's debris is focused in the upper landslide unit, and we interpret the intra-debris reflector as a basal shear zone or ‘glide plane’ upon which the debris has been remobilized. The origin of the intra-debris reflector is unclear, but we suggest it could be a relatively coarse-grained horizon that would be prone to fluid flow focusing and the development of excess fluid pressure. Our seismic study provides one of the most detailed examples of a subaqueous landslide system and reveals insights into the fluid flow system and potential basal shear zone development of the Tuaheni Landslide Complex.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
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  • 10
    Publication Date: 2019-02-01
    Type: Article , PeerReviewed
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