Now showing items 1-20 of 43

  • Arctic Holocene proxy climate database – New approaches to assessing geochronological accuracy and encoding climate variables 

    Sundqvist, H.S.; Kaufmann, Darrell; MaKay, Nickholas; Axford, Y.; Balascio, Nickholas; Briner, Jason P.; Cwynar, L.C.; Sejrup, Hans Petter; Subetto, D.A.; Andrews, J.T.; Bakke, Jostein; Birks, Harry John Betteley; Brooks, S.J.; Vernal, A.E.; Jennings, A.E.; Ljungvist, K.M.; Rûhland, K.M.; Saenger, C.; Smol, J.P.; Viau, A.E. (Copernicus Publications, 2014-08-29)
    We present a systematic compilation of previously published Holocene proxy climate records from the Arctic. We identified 170 sites from north of 58° N latitude where proxy time series extend back at least to 6 cal ka (all ...
    Journal article
  • 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 ...
    Journal article
  • 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 ...
    Peer reviewedJournal article
  • 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 ...
    Journal article
  • 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 ...
    Journal article
  • 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. ...
    Peer reviewedJournal article
  • 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 ...
    Journal article
  • 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 ...
    Journal article
  • Disentangling rock record bias and common-cause from redundancy in the British fossil record 

    Dunhill, Alexander M.; Hannisdal, Bjarte; Benton, Michael J. (Nature Publishing Group, 2014-09-04)
    The fossil record documents the history of life, but the reliability of that record has often been questioned. Spatiotemporal variability in sedimentary rock volume, sampling and research effort especially frustrates ...
    Journal article
  • 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 ...
    Journal article
  • 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 ...
    Peer reviewedJournal article
  • 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 ...
    Journal article
  • 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 ...
    Journal article
  • 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 ...
    Journal article
  • Evolution of a major segmented normal fault during multiphase rifting: The origin of plan-view zigzag geometry 

    Henstra, Gijs; Rotevatn, Atle; Gawthorpe, Steven L.; Ravnås, Rodmar (Elsevier, 2015-05)
    This case study addresses fault reactivation and linkage between distinct extensional episodes with variable stretching direction. Using 2-D and 3-D seismic reflection data we demonstrate how the Vesterdjupet Fault Zone, ...
    Journal article
  • 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 ...
    Journal article
  • 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 ...
    Journal article
  • Fluid migration pathways to seafloor seepage in inner Isfjorden and Adventfjorden, Svalbard 

    Roy, Srikumar; Senger, Kim; Braathen, Alvar; Noormets, Riko; Hovland, Martin; Olaussen, Snorre (Geological Society of Norway, 2014)
    This study represents a marine baseline study for the Longyearbyen CO2 Lab, in which CO2 may be injected in the Upper Triassic–Middle Jurassic Kapp Toscana Group, which comprises several permeable beds. The target ...
    Journal article
  • 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 ...
    Journal article