Blar i Department of Earth Science på tittel
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Tephra horizons identified in the western North Atlantic and Nordic Seas during the Last Glacial Period: Extending the marine tephra framework
(Journal article; Peer reviewed, 2020)Geochemically distinct volcanic ash (tephra) deposits are increasingly acknowledged as a key geochronological tool to synchronize independent paleoclimate archives. Recent advances in the detection of invisible (crypto) ... -
Tephrochronology of the North Atlantic during the Last Glacial period – a paleoclimate synchronization tool
(Doctoral thesis, 2021-04-09)During present time, the global climate is changing at a rapid pace. To understand the future consequences of these changes, studies of past abrupt climate change are essential. A natural analogue to the current climate ... -
Textural and geochemical characteristics of hematitic chert deposits in SW Norway: Implications for formation settings and processes
(Master thesis, 2017-11-30)Jasper, a specific type of hematitic chert, is often interpreted as an ancient analogue to modern seafloor hydrothermal deposits. Modern low-temperature seafloor hydrothermal Fe-deposits are mainly produced by Fe(II)- ... -
The formation of the ophiolitic terrane of SW Norway - relationships between immature island arc volcanic sequences and trondhjemitic complexes on Bømlo
(Master thesis, 2021-10-01)Single zircon U/Pb dating, geochemistry, and field descriptions from trondhjemitic and tonalitic intrusions, intruding the Lykling Ophiolite Complex, provide new insights into the origin and evolution of the Early Ordovician ... -
THE GEOMETRY AND TOPOLOGY OF DEFORMATION BAND NETWORKS IN VOLCANICLASTIC ROCKS: A CASE STUDY FROM SHIHTIPING, SOUTH-EASTERN TAIWAN
(Master thesis, 2021-03-05)Deformation bands are tabular strain localization features, common in porous and granular rocks. These structures of millimeter to centimeter thickness can occur as single bands and develop into clusters or networks of ... -
The propagation, interaction and linkage of vein segments and the scatter of geometric data
(Master thesis, 2019-06-28)The lengths, widths, orientations, bridge widths and linkage characteristics of 636 vein segments from 84 arrays have been measured and analysed. The relationships between the parameters are assessed. The veins are in the ... -
The spatial-temporal geomorphology of meandering river channels in distributive fluvial systems
(Master thesis, 2019-06-28) -
The topographic evolution of post-Caledonian landscapes in the inner Nordfjord, SW-Norway | New insights from AFT dating and thermal history modelling
(Master thesis, 2021-08-24)The topographic evolution of the present-day mountains of western Norway is not completely resolved. Long after the breakup of the Caledonides, the mountains along the passive continental margin of Norway remain high, with ... -
A theoretical approach to glacier equilibrium-line altitudes using meteorological data and glacier massbalance
(Peer reviewed; Journal article, 2003-05-01)Based on a close exponential relationship between mean ablation-season temperature and winter precipitation at the equilibrium-line altitude (ELA) of 10 Norwegian glaciers, three equations are derived. The first equation ... -
Theoretical equilibrium-line altitudes and glacier buildup sensitivity in southern Norway based on meteorological data in a geographical information system
(Peer reviewed; Journal article, 2003-05-01)Three equations derived from a close exponential glacier-climate relationship at the equilibrium-line altitude (ELA) of Norwegian glaciers have been utilized and implemented in a geographical information system (GIS). The ... -
Time-lapse full waveform inversion in strongly scattering media
(Master thesis, 2019-06-25)In petroleum seismology, full waveform inversion (FWI) is known as a powerful method taking into account all available in seismic data information with which one can determine a high-resolution subsurface image. In time-lapse ... -
Time-lapse techniques for surface velocity, front position and calving rate measurement of a fast-flowing tidewater glacier in Svalbard
(Master thesis, 2015-05-31)Calving is the mechanical loss of icebergs from tidewater glaciers, responsible for 70% of the annual transfer of mass from the cryosphere to the ocean (van der Veen 1998a, 2002). To be able to correctly predict future ... -
The timing of deglaciation and the sequence of pioneer vegetation at Ringsaker, eastern Norway – and an earthquake-triggered landslide
(Peer reviewed; Journal article, 2018)We describe a sediment sequence comprising a thick till covered by thin beds of lacustrine sediments containing pollen and plant macrofossils derived from pioneer vegetation. Four consistent radiocarbon dates on terrestrial ... -
Tipping the balance: Shifts in sediment production in an active rift setting
(Peer reviewed; Journal article, 2019-02-06)Landscapes in actively developing rifts respond to tectonic forcing over a similar time scale to that of fault array evolution (i.e., 10^5–10^6 yr). Consequently transient landscapes (i.e., not in topographic steady state) ... -
Tolkning av refleksjonsseismiske data fra Van Mijenfjorden, Svalbard
(Master thesis, 2017-12-07)Grunnlaget for tolkningen i denne oppgaven er 53 av 68 tilgjengelige multi-kanals seismiske linjer som er samlet inn under Svalex i årene 2007-2014. De seismiske linjene sørget for god dekning av Van Mijenfjorden. Datasettet ... -
Topografi og dreneringsretninger under Nordfonna, Folgefonna
(Master thesis, 2012-01-09)Nordfonna er den nordligste av de tre breene på Folgefonnhalvøyen i Hardanger. Nordfonna er en godt vitenskapelig kartlagt isbre. Breens plassering gjør den sensitiv for klimatiske endringer og kan hjelpe forskere å forstå ... -
Topological Constraints by the Greenland–Scotland Ridge on AMOC and Climate
(Journal article; Peer reviewed, 2020)Changes in the geometry of ocean basins have been influential in driving climate change throughout Earth’s history. Here, we focus on the emergence of the Greenland–Scotland Ridge (GSR) and its influence on the ocean state, ... -
Topology and distribution of deformation bands in normal fault damage zones, Utah
(Master thesis, 2020-06-24)Deformation bands are common strain localization features in porous rocks and sediments that occur as millimeter to centimeter wide tabular zones. They may occur as single bands, network of bands or in clusters and are ... -
Topology of normal fault damage zones in carbonate rocks, Malta - implications for the development of connectivity in evolving fault networks
(Master thesis, 2016-11-21)Fault damage zones are known to be more complex in linkage zones, relays and at fault tips. From a reservoir perspective, these damage complexities may act as conduits or barriers for fluid flow, hence they need to be ...