Now showing items 1-20 of 35

  • Calendar year age estimates of Allerød - Younger Dryas sea-level oscillations at Os, western Norway 

    Lohne, Øystein S.; Bondevik, Stein; Mangerud, Jan; Schrader, Hans (John Wiley & Sons Ltd., 2004)
    A detailed shoreline displacement curve documents the Younger Dryas transgression in western Norway. The relative sea-level rise was more than 9m in an area which subsequently experienced an emergence of almost 60 m. The ...
  • The Cenozoic western Svalbard margin: sediment geometry and sedimentary processes in an area of ultraslow oceanic spreading 

    Amundsen, Ingrid Marie Hasle; Blinova, Maria; Hjelstuen, Berit Oline; Mjelde, Rolf; Haflidason, Haflidi (Springer, 2011-04-17)
    The northeastern high-latitude North Atlantic is characterised by the Bellsund and Isfjorden fans on the continental slope off west Svalbard, the asymmetrical ultraslow Knipovich spreading ridge and a 1,000 m deep rift ...
  • A community-based geological reconstruction of Antarctic Ice Sheet deglaciation since the Last Glacial Maximum 

    Bentley, Michael J.; Ocofaigh, Colm Ó.; Anderson, John B.; Conway, Howard; Davies, Bethan; Graham, Alastair G.C.; Hillenbrand, Claus-Dieter; Hodgson, Dominic A.; Jamieson, Stewart S.R.; Larter, Robert D.; Mackintosh, Andrew; Smith, James A.; Verleyen, Elie; Ackert, Robert P.; Bart, Philip J.; Berg, Sonja; Brunstein, Daniel; Canals, Miquel; Colhoun, Eric A.; Crosta, Xavier; Dickens, William A.; Domack, Eugene; Dowdeswell, Julian A.; Dunbar, Robert; Ehrmann, Werner; Evans, Jeffrey; Favier, Vincent; Fink, David; Fogwill, Christopher J.; Glasser, Neil F.; Gohl, Karsten; Golledge, Nicholas R.; Goodwin, Ian; Gore, Damian B.; Greenwood, Sarah L.; Hall, Brenda L.; Hall, Kevin; Hedding, David W.; Hein, Andrew S.; Hocking, Emma P.; Jakobsson, Martin; Johnson, Joanne S.; Jomelli, Vincent; Jones, R. Selwyn; Klages, Johann P.; Kristoffersen, Yngve; Kuhn, Gerhard; Leventer, Amy; Licht, Kathy; Lilly, Katherine; Lindow, Julia; Livingstone, Stephen J.; Massé, Guillaume; McGlone, Matt S.; Mckay, Robert M.; Melles, Martin; Miura, Hideki; Mulvaney, Robert; Nel, Werner; Nitsche, Frank O.; O'Brien, Philip E.; Post, Alexandra L.; Roberts, Stephen J.; Saunders, Krystyna M.; Selkirk, Patricia M.; Simms, Alexander R.; Spiegel, Cornelia; Stolldorf, Travis D.; Sugden, David E.; van der Putten, Nathalie; van Ommen, Tas; Verfaillie, Deborah; Vyverman, Wim; Wagner, Bernd; White, Duanne A.; Witus, Alexandra E.; Zwartz, Dan (Elsevier, 2014-09-15)
    A robust understanding of Antarctic Ice Sheet deglacial history since the Last Glacial Maximum is important in order to constrain ice sheet and glacial-isostatic adjustment models, and to explore the forcing mechanisms ...
  • Contractional deformation of porous sandstone: Insights from the Aztec Sandstone, SE Nevada, USA 

    Fossen, Haakon; Zuluaga, Luisa F.; Ballas, Gregory; Soliva, Roger; Rotevatn, Atle (Elsevier, 2015-05)
    Contractional deformation of highly porous sandstones is poorly explored, as compared to extensional deformation of such sedimentary rocks. In this work we explore the highly porous Aztec Sandstone in the footwall to the ...
  • Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center 

    Kandilarov, Aleksandre; Landa, Hildegunn; Mjelde, Rolf; Pedersen, Rolf Birger; Okino, Kyoko; Murai, Yoshio (Springer, 2010)
    A combined ocean bottom seismometer, multichannel seismic reflection and gravity study has been carried out along the spreading direction of the Knipovich Ridge over a topographic high that defines a segment center. ...
  • Dansgaard-Oeschger cycles: Interactions between ocean and sea ice intrinsic to the Nordic seas 

    Dokken, Trond Martin; Nisancioglu, Kerim Hestnes; Li, Camille; Battisti, David Stephen; Kissel, Catherine (American Geophysical UnionWiley, 2013-09)
    Dansgaard-Oeschger (D-O) cycles are the most dramatic, frequent, and wide-reaching abrupt climate changes in the geologic record. On Greenland, D-O cycles are characterized by an abrupt warming of 10 ± 5°C from a cold ...
  • Diagnostics of seismic time-lapse effects of sandstones based on laboratory data 

    Moyano, Bernardo; Johansen, Tor Arne; Agersborg, Remy; Spikes, Kyle Thomas (Society of Exploration Geophysicists, 2014-09)
    We evaluated a viscoelastic modeling of P- and S-wave velocity dispersion, attenuation, pressure, and fluid effects for a set of siliciclastic rock samples. Our analysis used a published laboratory data set of 63 ...
  • Drumlin relief 

    Spagnolo, Matteo; Clark, Chris D.; Hughes, Anna L.C. (Elsevier, 2012)
    Drumlin relief is a key parameter for testing predictions of models of drumlin formation. Although this metric is commonly described in textbooks as being of the order of a fewtens ofmetres, our critical review of the ...
  • Estimation of elastic moduli of mixed porous clay composites 

    Jensen, Erling Hugo; Andersen, Charlotte Faust; Johansen, Tor Arne (2011-01-13)
    We have developed a procedure for estimating the effec­tive elastic properties of various mixtures of smectite and kaolinite over a range of confining pressures, based on the individual effective elastic properties of pure ...
  • Evaluating balanced section restoration with thermochronology data: A case study from the Central Pyrenees 

    Erdős, Zoltán; van der Beek, Peter; Huismans, Ritske S. (American Geophysical Union, 2014-05-06)
    We present a new method that can be used to quantitatively evaluate the consistency between balanced section restorations and thermochronological data sets from orogenic belts. We have applied our method to a crustal-scale ...
  • Evidence for the asynchronous retreat of large outlet glaciers in southeast Greenland at the end of the last glaciation 

    Dyke, Laurence M.; Hughes, Anna L.C.; Murray, Tavi; Hiemstra, John F.; Andresen, Camilla S.; Rodés, Ángel (Elsevier, 2014-09-01)
    Recent rapid changes in the marine-terminating sectors of the Greenland Ice Sheet (GrIS) have prompted concerns about the future stability of the ice sheet. Long-term records of ice sheet behaviour provide valuable context ...
  • Evidence for three North Sea tsunamis at the Shetland Islands between 8000 and 1500 years ago 

    Bondevik, Stein; Mangerud, Jan; Dawson, Sue; Dawson, Alastair; Lohne, Øystein S. (Elsevier Ltd., 2005-08)
    Coastal fen- and lake deposits enclose sand layers that record at least three Holocene tsunamis at the Shetland Islands. The oldest is the well-known Storegga tsunami (ca 8100 cal yr BP), which at the Shetlands invaded ...
  • Experimental investigation of deformation mechanisms during shear-enhanced compaction in poorly lithified sandstone and sand 

    Skurtveit, Elin; Torabi, Anita; Gabrielsen, Roy H.; Zoback, Mark D. (Wiley, 2013-08-27)
    Shear-enhanced compaction in shallow sandstone reservoirs has been investigated in laboratory experiments using high-pressure triaxial testing of poorly lithified sandstone and sand. We have studied the deformation ...
  • Extensional inheritance and surface processes as controlling factors of mountain belt structure 

    Erdős, Zoltán; Huismans, Ritske S.; van der Beek, Peter; Thieulot, Cedric (WileyAmerican Geophysical Union, 2014-12)
    Surface processes and inherited structures are widely regarded as factors that strongly influence the evolution of mountain belts. The first-order effects of these parameters have been studied extensively throughout the ...
  • Four billion years of ophiolites reveal secular trends in oceanic crust formation 

    Furnes, Harald; De Wit, Maarten; Dilek, Yildirim (Elsevier, 2014-07)
    We combine a geological, geochemical and tectonic dataset from 118 ophiolite complexes of the major global Phanerozoic orogenic belts with similar datasets of ophiolites from 111 Precambrian greenstone belts to construct ...
  • Fracture-generated permeability and groundwater yield in Norway 

    Gudmundsson, Agust; Løtveit, Ingrid Fjeldskaar; Gjesdal, Otilie (Norges geologiske undersøkelse, 2002)
    The transport of groundwater in bedrock is largely determined by interconnected fractures and their apertures. The conditions by which fractures become interconnected are thus of primary importance in understanding ...
  • Hemipelagic deposits on the Mendeleev and northwestern Alpha submarine Ridges in the Arctic Ocean: acoustic stratigraphy, depositional environment and an inter-ridge correlation calibrated by the ACEX results 

    Bruvoll, Vibeke; Kristoffersen, Yngve; Coakley, Bernard J.; Hopper, John R. (Springer, 2010)
    The first high resolution multichannel seismic data from the Mendeleev and Alpha Ridges in the Arctic Ocean have been used to investigate the depositional history, and compare acoustic stratigraphies of the three main ...
  • Improved quantitative calibration of rock physics models 

    Moyano, Bernardo; Jensen, Erling Hugo; Johansen, Tor Arne (Geological Society, 2011-11)
    In reservoir characterization, rock-physics models provide the link between seismic observables (density, compressional and shear wavespeeds) and reservoir parameters such as porosity, lithology and fluid saturation. ...
  • Modeling compaction effects on the elastic properties of clay-water composites 

    Moyano, Bernardo; Spikes, Kyle Thomas; Johansen, Tor Arne; Mondol, Nazmul Haque (Society of Exploration Geophysicists, 2012-09)
    Modeling the elastic properties of clay-bearing rocks (shales) requires thorough knowledge of the mineral constituents, their elastic properties, pore space microstructure, and orientations of clay platelets. Information ...